Derby County goalkeeper Kelle Roos has penned a new three-year contract with the club, as revealed by the club's website on Monday.

The Dutchman made his breakthrough into Frank Lampard's side during the second half of last season following Scott Carson's injury, and he kept his place right up to the end of the campaign.

Roos has been at Derby since joining from Nuneaton Town in January 2014, but he has only made a total of 29 appearances for the club with the majority coming last season.

There was doubt over Roos' future following Derby's failure to win promotion, with the 'keeper making a critical error in the play-off final to allow John McGinn to score for Villa.

The goalkeeper made 19 appearances for the Rams last season, but is he worthy of his new deal?

We take a closer look...

Roos conceded a total of 19 goals during his run in the side, which is not a bad return when it is considered that this averages out to just one goal per game. However, it should also be noted that he kept a respectable six clean sheets, which equates to just under one every three games (31.6%). Shot-stopping is one of the goalkeepers most notable traits, with his strong reflexes sparing Derby's blushes on occasions.

Lampard prefers his Derby side to play out from the back, which puts pressure on Roos's distribution abilities. He has completed an average of 29 passes per game, but an average of just six of those have been long balls. This reflects how Roos is more comfortable playing short passes, while there is room to improve his long-range kicking next season. His 61.3% pass success rate is a result of this sometimes being an issue and Roos would also benefit from strengthening the speed of his decision making when receiving the ball.

Overall, Roos' stats suggest his shot-stopping abilities largely helped him earn the number one jersey at Derby in the second half of the season. It is also a show of confidence for the club to hand him a new deal following his Wembley error, but he needs to improve certain aspects of his game further next season to fully repay the club for their commitment in him.