Sam Johnstone
Sam JohnstoneGetty

Doncaster Rovers have reportedly extended Manchester United goalkeeper Sam Johnstone's loan spell until the end of the month.

According to Sky Sports, the England U21 keeper will remain at Keepmoat Stadium until 28 January and will be available for their next five games.

Johnstone has been impressive during his stay with Doncaster and has conceded just 10 goals in 13 games that he has played for the club. The young Englishman has found touch of form of late, keeping four clean sheets in his last seven games.

These performances have earned him the extension to remain with Paul Dickov's team, with whom he also spent four months on-loan last season making a total of 18 appearances.

With United keeper Anders Lindegaard's future in doubt following reports about the Red Devils having released him and also the keeper insisting that he wants to play regularly, the young England U21 goalkeeper will hope to impress Louis van Gaal and play himself into the manager's plans for the rest of the season.

However, earlier in the season, reports suggested that Johnstone's future at his parent club was in doubt after being left out of United's first-team photo-call.

Meanwhile, Ander Herrera has revealed the delight at progressing to the fourth round of the FA Cup following the Old Trafford club's victory over Yeovil.

United have not won the tournament for over ten years now, and the midfielder revealed that Ryan Giggs has urged the team to go on and win the trophy this season.

"Ryan Giggs said to us two days ago that we should not be [over] 10 years without this title. Of course we are going to try to win, even though we know it will be very difficult. All the teams in England are ready to win this competition but, of course, we are Manchester United and we have to try to win this competition," Herrera told United's official site.

"We are happy, of course, because we won [against Yeovil], but I think we could have done it better in the first-half. Then, in the second half, we tried to give the ball more and be more patient. Of course, we are happy about the FA Cup which is, as I said before, a very, very emotional tournament," the Spaniard added.