REUTERS SPORTS SCHEDULE AT 6.30 p.m. GMT/2.30 p.m. ET

Olympic 800-metres champion Caster Semenya on Wednesday lost her appeal against rules that mean middle distance female athletes with a high natural level of testosterone must take medication to reduce it.

TENNIS-GIMELSTOB/ Gimelstob says he will resign from ATP board after assault sentence

LONDON (Reuters) - Former player Justin Gimelstob will step down from the ATP board of directors and will not seek re-election after being sentenced following a felony battery charge, the New York Times quoted him as saying on Wednesday. SOCCER-CASILLAS/

Porto goalkeeper Casillas suffers heart attack, taken to hospital - club statement Spain's World Cup winning captain Iker Casillas, 37, suffered a heart attack while training with his team Porto on Wednesday and was taken to hospital, the Portuguese club said in a statement, adding that the goalkeeper's life was not in danger.

UPCOMING SOCCER

SOCCER-ENGLAND/PREVIEW Premier League preview

Preview of the upcoming Premier League weekend. 1 May 16:30 ET / 20:30 GMT

SOCCER-BRAZIL-CTH-CHP/REPORT (PIX) Soccer - Brasileiro Championship - Corinthians v Chapecoense

Brasileiro Championship - Corinthians v Chapecoense 1 May 17:30 ET / 21:30 GMT

SOCCER-CHAMPIONS-FCB-LIV/REPORT Soccer - Champions League - FC Barcelona v Liverpool

Barcelona welcome Liverpool to the Nou Camp for the first leg of their Champions League semi-final. 1 May 15:00 ET / 19:00 GMT

SOCCER-CONCACAF-MNT-TUA/REPORT Soccer - CONCACAF Champions League Final - Second Leg - Monterrey v Tigres UANL

Monterrey face Tigres UANL in the second leg of the CONCACAF Champions League Final at the BBVA Stadium. 1 May 22:00 ET / 02:00 GMT

SOCCER-ITALY/PREVIEW Soccer - Italy - Serie A preview

Preview of the weekend's Serie A games 2 May 06:00 ET / 10:00 GMT

CYCLING CYCLING-YORKSHIRE/ (TV)

Cycling - United Kingdom - Tour de Yorkshire Team INEOS, formely Team Sky, race in the Tour de Yorkshire and Chris Froome is on the start list. Stage one is a 182.5-kilometre ride from Doncaster to Selbey.

2 May 08:00 ET / 12:00 GMT HORSERACING

HORSERACING-KENTUCKY-COLLMUS/ Horse racing - Kentucky Derby race caller says he has bad memory

Larry Collmus on Saturday will call his ninth Kentucky Derby for American broadcaster NBC, but he perhaps is best known for how he called an obscure race back in 2010. 2 May 10:00 ET / 14:00 GMT

GOLF GOLF-WELLSFARGO/

Golf - PGA Tour: Wells Fargo Championship first round First round of Wells Fargo Championship in Charlotte, North Carolina, where Rory McIlroy, Justin Rose and defending champion Jason Day head a loaded field.

May 2 FOOTBALL

FOOTBALL-NFL-NOTEBOOK Field Level Media-NFL notebook

News and notes from around the NFL. 1 May 19:00 ET/ 23:00 GMT