| Women's doubles | |
|---|---|
| 2018 Stockton Challenger | |
| Champions |  Hayley Carter Ena Shibahara |
| Runners-up | Quinn Gleason  Luisa Stefani |
| Score | 7–5, 5–7, [10–7] |
Usue Maitane Arconada and Sofia Kenin were the defending champions, but chose not to participate this year.
Hayley Carter and Ena Shibahara won the title, defeating Quinn Gleason and Luisa Stefani in the final, 7–5, 5–7, [10–7].
Asia Muhammad / Maria Sanchez (quarterfinals, withdrew)
Jovana Jakšić / 
Cornelia Lister (quarterfinals)
Beatrice Gumulya / 
Ana Veselinović (first round) Sanaz Marand / Whitney Osuigwe (quarterfinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | A Muhammad M Sanchez | 3 | 6 | [10] | |||||||||||||||||||||||
 S Fichman J Loeb | 6 | 4 | [8] | 1 | A Muhammad M Sanchez | ||||||||||||||||||||||
| WC |  R Nederstigt D Willson | 1 | 1 | Q Gleason L Stefani | w/o | ||||||||||||||||||||||
| Q Gleason L Stefani | 6 | 6 | Q Gleason L Stefani | 6 | 6 | ||||||||||||||||||||||
| 3 | B Gumulya A Veselinović | 2 | 0 | WC | R Anderson M Manasse | 4 | 1 | ||||||||||||||||||||
| WC | R Anderson M Manasse | 6 | 6 | WC | R Anderson M Manasse | 6 | 77 | ||||||||||||||||||||
| V Duval B Haddad Maia | WC | L Guillermo C Harrison | 1 | 62 | |||||||||||||||||||||||
| WC | L Guillermo C Harrison | w/o | Q Gleason L Stefani | 5 | 7 | [7] | |||||||||||||||||||||
| K Ahn E Bektas | 62 | 3 | H Carter E Shibahara | 7 | 5 | [10] | |||||||||||||||||||||
| H Carter E Shibahara | 77 | 6 | H Carter E Shibahara | 6 | 6 | ||||||||||||||||||||||
| M Brengle A Kratzer | 5 | 3 | 4 | S Marand W Osuigwe | 3 | 4 | |||||||||||||||||||||
| 4 | S Marand W Osuigwe | 7 | 6 | H Carter E Shibahara | 6 | 6 | |||||||||||||||||||||
| J Elie J Rompies | 5 | 3 |  U Eikeri PC Gonçalves | 0 | 3 | ||||||||||||||||||||||
| U Eikeri PC Gonçalves | 7 | 6 | U Eikeri PC Gonçalves | 6 | 6 | ||||||||||||||||||||||
| L Chirico L Davis | 5 | 3 | 2 | J Jakšić C Lister | 4 | 4 | |||||||||||||||||||||
| 2 | J Jakšić C Lister | 7 | 6 | ||||||||||||||||||||||||
Wesley Moodie and Todd Perry were the defending champions, but chose not to participate that year.
Petr Korda was the defending champion but lost in the quarterfinals to Sergi Bruguera.
Lleyton Hewitt was the defending champion but did not compete that year.
The 1999 Thalgo Australian Women's Hardcourts singles was the singles event of the third edition of the Thalgo Australian Women's Hardcourts; a WTA Tier III tournament held in the Gold Coast. Ai Sugiyama was the defending champion but lost in the semifinals to Patty Schnyder.
Serena Williams defeated Steffi Graf in the final, 6–3, 3–6, 7–5 to win the women's singles tennis title at the 1999 Indian Wells Open. It was the second and last time that the two would contest a professional match.
Mark Knowles and Daniel Nestor were the defending champions but lost in the quarterfinals to Roger Federer and Max Mirnyi.
James Blake and Todd Martin were the defending champions but lost in the second round to Wayne Arthurs and Paul Hanley.
Martin Verkerk was the defending champion but lost in the quarterfinals to Grégory Carraz.
David Sánchez was the defending champion but lost in the semifinals to Gustavo Kuerten.
Alexander Volkov was the defending champion, but lost to Daniel Vacek in the quarterfinal.
Carl-Uwe Steeb won in the final 7–6(7–5), 3–6, 7–6(8–6) against Daniel Vacek.
Daniel Nestor and Nenad Zimonjić were the defending champions, but lost to Mahesh Bhupathi and Max Mirnyi in the quarterfinals.
Bhupathi and Mirnyi won this tournament, by defeating Mark Knowles and Andy Ram 7–5, 7–5 in the final.
Maria Sharapova defeated Kim Clijsters in the final, 7–5, 7–5 to win the singles tennis title at the 2006 Southern California Open.
Feliciano López was the defending champion but lost to Radek Štěpánek in the quarterfinals.
The 1999 Warsaw Cup by Heros singles was the singles event of the fifth edition of the Warsaw Open; a WTA Tier IV tournament held in Warsaw, Poland. Conchita Martínez won the tournament last year when it was a Tier III event. She did not compete this year.
Roger Federer was the defending champion, but was forced to withdraw from the tournament before the semifinals because of a back injury. Following Federer's withdrawal, Stefan Edberg and Jo-Wilfried Tsonga played a one set exhibition match to make up the evening session.
Lisa Raymond and Mike Bryan were the defending champions, but lost in the quarterfinals to Cara Black and Wayne Black.
Rohan Bopanna and Florin Mergea were the defending champions, but lost to Jean-Julien Rojer and Horia Tecău in the final, 4–6, 6–7(5–7).
Julio Peralta and Horacio Zeballos were the defending champions, but lost in the quarterfinals to Facundo Bagnis and Guillermo Durán.
Rohan Bopanna and Jeevan Nedunchezhiyan were the defending champions, but lost in the quarterfinals to Pierre-Hugues Herbert and Gilles Simon.
Magnus Gustafsson successfully defended his title, by defeating Tomás Carbonell 5–7, 7–5, 6–4 in the final.