Roger Federer found a way to beat Germany’s Dominik Koepfer in the French Open, despite being far from his best in a scrappy third-round match.

Federer, 39, lacked fluency and trust in his game before coming through to win 7-6 (7-5) 6-7 (3-7) 7-6 (7-4) 7-5 at a near-empty Roland Garros.

The Swiss 20-time Grand Slam champion clinched victory after three hours and 35 minutes at 00:43 local time.

He will play Italian ninth seed Matteo Berrettini

This post was originally posted on BBC News. Read the rest of the story at https://www.bbc.co.uk/sport/tennis/57372320.

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