Roger Federer confirmed his participation for this year's Madrid Open on Wednesday, marking his return to the European clay court season after two years away.
The 20-times Grand Slam champion has not played this year since his Australian Open round of 16 defeat by Greek Stefanos Tsitsipas in January.
Federer, whose sole French Open title came in 2009, has preferred to skip the European clay season over the last two seasons to manage his schedule.
The 37-year-old Swiss is the second most successful player at the Caja Magica behind Rafa Nadal, winning three titles in 2006, 2009 and 2012.
World number one Novak Djokovic and 11-times French Open winner Nadal are also expected to feature at the Madrid Open, which will be played from May 3-12.