The Evening Chronicle says Redknapp dispatched his chief scout Ian Broomfield to the Reebok Stadium on Boxing Day to keep an eye on the pair's progress.
And he did not leave disappointed as both players put in solid performances in the 2-0 win at Bolton Wanderers.
Redknapp had said yesterday: "If we're going to make a signing, let's make one big signing. That would send out a message.
"But it's difficult finding that player who would make a difference."
United officials have made it clear that they don't want to sell anybody this January.