US
World number one has pulled out of the Madrid Open three times in four years
The 22-time Grand Slam winner has faced the Barcelona Open defeat on his post-injury return
37-year-old beats Cobolli 6-2, 6-3 in the first match since January
Spaniard will play 63rd-ranked Flavio Cobolli in his opening match next week
Spaniard has been sidelined by muscle injury since January
The Spanish icon's bombshell decision came four days after the 37-year-old lost an exhibition game
World number two intends to play a made-for-Netflix exhibition in Las Vegas against Nadal
37-year-old hopes to comeback at Indian Wells in March
Carlos Alcaraz, Jannik Sinner, Daniil Medvedev and Holger Rune will also play
37-year-old Spaniard signs up as tennis ambassador for the Saudi Tennis Federation