One winger goes down, while another comes up.

Such are the fortunes for Sir Alex Ferguson's Manchester United side, as the much-anticipated FA Cup quarter-finals match at Old Trafford looms for the Red Devils this Saturday.

Portuguese winger Nani is reported to be sidelined for up to a month as the gash on his left shin is worse than anticipated.

However, Ecuadorian winger Antonio Valencia could be available after making progress with the ankle injury he sustained in September.

Much like Jonny Evans and Ji-Sung Park, Valencia appears close to a return, but there is still no word from Ferguson about any of the three players' availability for Saturday's match.

Of the hurt Red Devil players, central defender Rio Ferdinand stands the best chance of starting the match.

Ferdinand has irked many Arsenal fans in expressing his admiration for Massimo Busacca, the referee who presided over the questionable officiating in Tuesday's Champions League match that saw the Gunners fall to Barcelona.

Brazilian midfielder Anderson is nowhere near full form after injuring his knee in late February.