Now in rude health, the Portuguese winger has added to Sir Alex's already pounding selection headache with crucial matches in the title race, FA Cup and UEFA Champions League approaching – but as the boss admits, it's a welcome problem at this stage of the season.
“Nani was out with an injury for six weeks or more," said Sir Alex. "We sent him back to Portugal for treatment and tried to get the injury to settle. He's never really had an injury.
“Now he's back fit, training well, he's a consideration. There's no doubt about that. It gives me a headache because Antonio Valencia has been a fantastic player for us and I know Nani likes playing on the right.
"We like to play Nani on the left sometimes. We also have Ashley Young who can play on the left and we have Ryan Giggs who can play there if we want him to play in a different way.
"Our options are fantastic. I think that puts us in a strong position."