Defending champ Novak Djokovic suffered a major upset at the hands of unseeded Denis Istomin in a marathon 4-hour, 48-minute match at the Australian Open. Istomin is ranked 117th in the world.
Andy Murray defeated Juan Martín del Potro in four sets on Sunday to become the first tennis player to win two Olympics singles gold medals.
Roger Federer lost in the Wimbledon semifinals for the first time in his career, falling to Milos Raonic in a five-set match Friday.
After saving three match points in the fourth set, Roger Federer made it through to the semifinals at Wimbledon for the 11th time.
Nick Kyrgios apologised for reportedly calling a member of his entourage 'retarded' on court during his win over Feliciano Lopez as he booked a last-16 meeting with Andy Murray.
Novak Djokovic's top half of the Wimbledon draw features seven-time winner Roger Federer.
