This is a list of Mexican football transfers in the Mexican Primera Division during the summer 2009 transfer window, grouped by club. Football has been played professionally in Mexico since the early 1900s. Since 1996, the country has played two split seasons instead of a traditional long season. There are two separate playoff and league divisions. After many years of calling the regular seasons as "Verano" (Summer) and "Invierno" (Winter), the Primera División de México (Mexican First League Division) has changed the names of the competition and opted for "Apertura" (opening) and "Clausura" (closing) events. The Apertura division begins in the middle of Mexico's summer and ends before the official start of winter. The Clausura division begins during the New Year and concludes in the spring season.
In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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Club de Fútbol Monterrey is a Mexican professional football club based in the Monterrey metropolitan area, Nuevo León. The team plays in Liga MX, the top tier of Mexican football. Founded on 28 June 1945, it is the oldest active professional team from the northern part of Mexico. Since 1999 the club has been owned by FEMSA, Latin America's largest bottling company. Its home games have been played in the Estadio BBVA since 2015. The team's nickname of Rayados stems from the club's traditional navy blue striped uniform. The uniform is reflected in the club's current crest, which is also decorated with stars above the crest representing the club's league titles and stars below representing continental.
F.C. Atlas debuted the Apertura 2009 on July 25, 2009, with a 1–0 win over Pumas.
Javier Güémez López is a Mexican professional footballer who plays as a defensive midfielder for Liga MX club Atlético San Luis.
C.F. Monterrey Femenil is a Mexican professional women's football club based in Guadalupe, Nuevo León, Mexico that competes in the Liga MX Femenil. The club has been the women's section of C.F. Monterrey since 2016. The team plays its home matches at Estadio BBVA.
The 2020–21 Liga MX season was the 74th professional season of the top-flight football league in Mexico. The season was divided into two championships—the Torneo Guardianes 2020 and the Torneo Guardianes 2021—each in an identical format and each contested by the same eighteen teams. Both the Apertura 2020 and Clausura 2021 tournaments were renamed "Torneo Guardianes 2020" and "Torneo Guardianes 2021" to honor healthcare workers in the aftermath of the COVID-19 pandemic in Mexico. The Guardianes 2020 tournament began on 24 July 2020.
The 2021–22 Liga MX season was the 75th professional season of the top-flight football league in Mexico. The season was divided into two championships—the Apertura 2021 and the Clausura 2022—each in an identical format and each contested by the same eighteen teams.
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