PIX: Champs Croatia fall flat at revamped Davis Cup

Images from Day one of the 2019 Davis Cup at La Caja Magica in Madrid on Monday IMAGE: Croatia's Borna Coric reacts during his group stage match against Russia's Karen Khachanov. Photograph:......

Federer's suggestion to end marathon sets

IMAGE: Switzerland's Roger Federer celebrates winning the second set in his match against USA's Steve Johnson on Monday. Photograph: Andrew Couldridge/Reuters Roger Federer thinks a tie-breaker at......

Japan's Nishikori pulls out of Wimbledon with calf strain

Kei Nishikori of Japan in action. Photograph: Shaun Botterill/Getty Images Japanese fifth seed Kei Nishikori pulled out of Wimbledon before his second round match on Wednesday after failing to......

Serena and Djokovic up and running at Wimbledon

Defending champion Novak Djokovic of Serbia reacts after winning his Gentlemen’s Singles first round match against Philipp Kohlschreiber of Germany. Photograph: Julian Finney/Getty Images......

Istanbul Open: Federer reaches last four

Roger Federer of Switzerland in action. Photographs: Julian Finney/Getty Images Roger Federer was given a fright before reaching the semi-final of the inaugural Istanbul Open on Friday, eventually......