Serena and Sloan renew their rivalry Monday at the French Open.

It’s Serena and Vika Saturday at the French Open.

Notes: Gulbis is defending the Nice title (d. Federico Delbonis) then a Roland Garros semifinal…Gulbis is 1-11 win-loss this year…(8) Monaco could start against Querrey…Wildcards went to France’s Maxime Hamou and Lucas Pouille, and Australia’s Thanasi Kokkinakis…Withdrawing from the tournament were Simone Bolelli, Guillermo Garcia-Lopez, Martin Klizan, and Diego Schwartzman…Gulbis (2015) is the lone returning champ in the field.

Serena’s draw to the semifinals could go through Stosur, last year’s finalist Errani then the former French champ Ivanovic to meet either Sharapova or Wozniacki in the semis…

Notes: A Czech offensive in Prague with the first three seeds from the home country…(8) Giorgi starts against the resurgent Wickmayer…Wildcards were awarded to Czechs Denisa Allertova and Klara Koukalova, and Slovak Kristina Schmiedlova…Pulling from the event were former champ Magdalena Rybarikova and Carla Suarez Navarro…Pliskova is the top seed in singles and doubles…In last year’s final Brit Heather Watson beat Anna Karolina Schmiedlova…Former champs in the field are Watson (2014)and Safarova (2013-12).

Not a lot of floating talent in the field, with a potential tough start for (16) Watson vs. the riser Vekic; (1) Bouchard could face Stephens in the 3rd rd…Wildcards went to Bouchard and Americans Varvara Lepchenko, Bethanie Mattek-Sands and Sachia Vickery…

All the hubbub surrounds Serena, but Venus is not ending her boycott since last playing in 2001. “I made my schedule up,” Venus said about missing IW again. “I’m entered in Miami, and that’s pretty much what it is. I haven’t really given a lot of thought to it. I have just been focusing on this year…I just respect every decision [Serena] makes, pretty much. It’s nothing complicated about it.”

Nadal a question mark after a cramp-ridden semifinal loss on Saturday at the Rio Open…Not a lot of early challenges besides (7) Andujar opening against Almagro…Wildcards went to Argentines Guido Andreozzi, Renzo Olivo and Horacio Zeballos…David Ferrer beat Fognini in last year’s final…Nadal is making his first appearance in Buenos Aires in 10 years…Ferrer passes on the opportunity to win a fourth consecutive Buenos Aires title in a row…Returning former champs in the field are Almagro (2011), Robredo (2009), and Juan Monaco (2007).

…Venus Williams beat Cornet in last year’s final…Returning former champs in the field are Venus Williams (2014,’10-09), Kvitova (2013), Radwanska (2012), and Wozniacki (2011).

Notes: Loaded field with a slew of floaters testing seeds early…Li Na out with a knee injury…The Top 8 seeds receive first-round byes…

Notes: Solid field with four Top 10ers and two unseeded Slam champs…The Top 4 seeds receive opening round byes, with tough starts for (5) Ivanovic vs. Lisicki, (4) Azarenka after a bye likely vs. (WC) Venus, (3) Kerber likely vs. Vandeweghe, (7) Suarez Navarro vs. Puig, and (2) Radwanska likely vs. Garcia…Wildcards went to Americans Kristie Ahn and Venus, and Azarenka…Pulling from the tournament were Sara Errani and Petra Kvitova…Cibulkova beat Radwanska in last year’s final…Venus is 2-4 in Stanford finals…Martina Navratilova (5-4) has reached the most Stanford finals in the tournament’s history…Returning champs in the field are Cibulkova (2013), Serena Williams (2012-11), Azarenka (2010), and Venus Williams (2002,’00).

Notables withdrawing from the event were Americans Serena Williams and Vania King, Flavia Pennetta, and Carla Suarez Navarro…Serena beat Swede Johanna Larsson in last year’s final…Hercog (2012-11) is the lone former champ in the field.

Potential tough starts for (1) Isner after a bye vs. compatriot (Q) Sock, and (2) Gulbis after a bye vs. the giant-killer Klizan…Isner has a 1-2 career record in Nice…This is the 30th anniversary of the Nice tournament…

It was the fourth career title on clay for Verdasco, who improved to 6-13 in career finals. Almagro extended a losing streak in finals of his own, dropping his fourth straight final and falling to 12-9 career in finals. He repeated his runner-up effort of 2013 when he lost to John Isner in the Houston final.

Notes: (7) Hewitt likely to meet Querrey 2nd rd., and (8) Karlovic opens against Sock…Wildcards went to Marcos Baghdatis and Americans Steve Johnson and Rhyne Williams…Pulling from the event were Pablo Cuevas, Alejandro Falla, Bradley Klahn, and Janko Tipsarevic…Isner beat Almagro in last year’s final…The Bryan brothers are the top seeds in doubles…Returning champs in the field are Isner (2013), Monaco (2012), Hewitt (2009) and Karlovic (2007).