The United boss suggested in an exclusive interview with MUTV that Shinji Kagawa and Nick Powell may not be the only arrivals this summer if his plans bear fruit. Despite intense media speculation, the Reds will continue to conduct any negotiations in private and it often proves to be a lengthy business.
When asked if he is hoping to make further additions, Sir Alex replied: "Yes, there's a possibility. We’re working on one or two things but there’s nothing really to tell you to be honest.
"We always try to get our work done at the end of the season – we spent a good deal of time sorting the deal with Shinji and we’d agreed a deal with Nick Powell before the play-offs which was a good move by us because the boy had an outstanding final at Wembley.
"When you don’t get deals done immediately and you’re negotiating with a club over a long period, then you can’t expect to just snap your fingers and get it done."
Sir Alex Ferguson's exclusive MUTV interview will be screened at 18:30 BST today (Tuesday).