Manchester United midfielder Juan Mata has welcomed Radamel Falcao to the club, praising the striker's "extraordinary" abilities in front of goal.

United completed a sensational move for Falcao on transfer deadline day, signing the Colombian international on a season-long loan deal from Monaco with the option to buy next summer.

The 28-year-old's arrival, along with that of Angel Di Maria for a club record fee of £59.6m, has raised questions of where Mata will fit into United's starting XI this term.

However, the Spaniard is confident the club's newest arrival will seamlessly add something to Louis van Gaal's forward line without disruption, ahead of a possible debut against Queens Park Rangers on Sunday.

"Almost at the end of the transfer window we had a new signing," Mata wrote through his personal blog. "Not just a player, but a fantastic striker whose ability to score is extraordinary: Radamel Falcao.

"I am sure he will give a lot to our group, as a person and with his goals, and here I welcome him and wish him the best for this season."

Falcao, who struck 70 goals in just 91 games for Atletico Madrid prior to his move to Monaco last summer, has already proved his fitness this season after missing his country's World Cup campaign through a cruciate ligament injury.

The striker made three appearances for Monaco ahead his move to United and came on as a substitute during Colombia's friendly defeat to Brazil on Friday night.

Falcao could one of four debutants for United when they host Harry Redknapp's side on Sunday after Louis van Gaal's squad concerns continued to ease during the international break.

Fellow deadline day signing Daley Blind is likely to start in midfield while Marcos Rojo could join him having received a work with Chris Smalling absent and concerns over Phil Jones' fitness.

After suffering a hamstring injury ahead of the new season, £27m summer signing Luke Shaw could also make his full debut for the club having returned to training this week.

Spanish midfielder Ander Herrera also returned to training following a layoff and tweeted on Monday he will be in action at Old Trafford at the weekend.