AFP Sports Agenda for Wednesday, September 9 (all times GMT): Twitter: @AFP_Sport Instagram: @afpsport + Serena Williams eyes US Open semis + Tour de France heads inland with Primoz Roglic in the yellow jersey + Boston look to seal their place in the NBA semi-finals TENNIS -- Serena Williams faces Tsvetana Pironkova, Victoria Azarenka faces Elise Mertens and Andrey Rublev faces Daniil Medvedev for places in the US Open semi-finals. Coverage by Peter Hutchison. Picture (TENNIS-USA-OPEN) -- European clay season is underway with women's event in Istanbul (TENNIS-WTA-TUR) and men's tournament in Kitzbuhel (TENNIS-ATP-AUT) CYCLING -- Stage 11 of the Tour de France takes the riders away from the sea and inland, a 167.5km ride from Chatelaillon-Plage to Poitiers which should suit the sprinters. Coverage by Damian McCall. Picture. Video. Graphic (CYCLING-TOUR-FRA) -- Third stage of the Tirreno-Adriatico from Follonica to Saturnia is the longest of the race at 217 kilometres, a flat first half followed by a hilly second, which is going to test the a field featuring former Tour de France winners Chris Froome and Geraint Thomas. (CYCLING-ITA) OLYMPICS -- IOC executive board virtual meeting on latest Tokyo and Covid-19 developments. Meeting begins 1000 with press conference sceduled for 1600. (OLY-IOC-HEALTH-VIRUS) RUGBY UNION -- English Premiership. Exeter v Gloucester, Wasps v Leicester (both 1630), Sale v Saracens (1700), Bath v Worcester, London Irish v Harlequins (1845). (RUGBYU-ENG-PR) BASKETBALL -- NBA play-offs in Orlando, Florida: Boston v Toronto in game six (Boston lead 3-2) (2330), LA Clippers v Denver in game four (Clippers lead 2-1) (0200 Thursday). Picture (BASKET-NBA) ICE HOCKEY -- NHL Eastern Conference final, game two in Edmonton, Alberta: New York Islanders v Tampa Bay Lightning (Tampa Bay lead series 1-0) (0200 Thursday) (IHOCKEY-NHL) afp