Federer frustrated by weather

Roger Federer was frustrated by the weather on his return from injury at the Mercedes-Cup in Stuttgart.

The 17-time grand slam champion is making a comeback after being forced to pull out of the French Open due to a back problem, the latest in a long line of fitness issues that have decimated his 2016 campaign.

The 34-year-old could only manage 22 minutes on court before the heavens opened in Germany, wiping out play for the day.

That was sufficient time, however, for Federer to open up a 4-3 lead against Taylor Fritz with a break.

Reigning champion Nicolas Mahut is on course for a successful defence of the Ricoh Open in ‘s-Hertogenbosch, but was tested against his fellow Frenchman Paul-Henri Mathieu.

Mahut edged past Mathieu 4-6 6-1 6-4 to book his place in the quarter-finals.

Second seed Bernard Tomic was too good for British No 2 Aljaz Bedene, winning 6-4 6-3.