Roger Federer is targeting a third Olympic medal at the Tokyo Games this year, after missing out in 2016 due to injury, as he looks to gain momentum when he returns to the court this week following 13 months on the sidelines with a knee problem.

Federer, 39, is making his long-awaited comeback at the Qatar Open — where he plays Britain's Dan Evans in the second round — after two knee surgeries ended his season last year.

The Swiss has not played a competitive match since his Australian Open semifinal loss to Novak Djokovic last year but is already looking ahead to Wimbledon and the Olympics.