Kyle Edmund, Juan Martin del Potro, and Kei Nishikori progress at Wimbledon

Kyle Edmund kept the British flag flying at Wimbledon, beating Bradley Klahn on Centre Court.

The British number one produced a comprehensive defeat of American qualifier Klahn, easing to a 6-4 7-6 6-2 win.

Edmund will now face Novak Djokovic in round three, although the three-time champion has cast doubts over his fitness going into the clash.

Elsewhere, Juan Martin del Potro showed his class by dominating Feliciano Lopez.

The Argentinian, who beat Roger Federer to win at Indian Wells this year, was in total control before claiming a 6-4 6-1 6-2 win.

Meanwhile, Japanese star Kei Nisikori recovered from a bad start to beat Bernard Tomic 2-6 6-3 7-6 7-5.