I don't think Sir Alex will be looking to invest in another winger any time soon, not unless he flogs someone first and finds the ideal winger.
We have: Giggs (albeit used sparingly), Valencia, Nani, Obertan, Park, and Tosic. With the likes of Fletcher, Hargreaves, Gibson, and Welbeck used as wingers in some situations if needed.
This is why I highly doubt that Sir Alex is currently looking for another winger unless he's thinking about ditching some first (Nani, Tosic). However, if we do sell those two, I think we'll be very lucky to get £15million for the pair. When I say we need another world class midfielder, I mean someone who will play the central role.
Over the years you'd have to say Manchester United's main outlet from the middle of the park has been Paul Scholes - on the top of his game he's the only one comparable to the best midfielders from other big teams in England and Europe. Eg. Frank Lampard, Michael Essien, Steven Gerrard, Cesc Fabregas, Xavi, Andrés Iniesta etc. But Scholes is obviously coming to the end of his career and we really lack a midfield player who is as creative or can score as many goals as the players listed above.
Obviously, we're still linked with wingers such as: David Silva, Franck Ribéry, Angel Di Maria, Neymar da Silva and more. I'd like us to sign David Silva if I'm honest, but the central midfield is where we're currently weakest. Marek Hamsik is a player who might be worthwhile in that regard.
We might well dip in for a striker soon too - but we're linked with way too many of those: Hulk, Benzema, Huntelaar, Aguero, Dzeko, Suárez, Villa etc. Dzeko or Huntelaar would be my favourites.
Also, apparently Real Madrid and Barcelona are in for Nemanja Vidic? If we lose him that'll be a massive blow. Real Madrid have also had the cheek to put in a £60million bid for Wayne Rooney, obviously not happening.
As for the game, I'm disappointed that there won't be mid-week football this week now :( but at the same time I'm happy as it allows us to field a stronger, or at least fresher team to face Birmingham on Saturday.