Ex-Manchester United defender Gary Neville has insisted that Chelsea duo John Terry and Gary Cahill should be worried ahead of their battle with in-form Arsenal striker Danny Welbeck, reports Goal.com.
Neville - who was speaking on Sky Sports after Welbeck's hat-trick for the Gunners against Turkish outfit Galatasaray in the Champions League last night - believes the England international can be 'unplayable' at times.
However, Neville has insisted that Welbeck must continue be handed a consistent role by Gunners chief Arsene Wenger as he continues to develop the striker.
Welbeck, of course, was shipped out to the wing on a number of occasions throughout his Manchester United career, and now seems to be excelling as the main man at the Emirates.
"I think it's consistency for Danny, consistency in a number of areas," Neville said on Sky Sports. "One, just playing, he said it himself, playing as a centre-forward regularly, he was in and out of United's team and he was in and out of playing centre-forward, he was playing left and right wing."
The Manchester United legend has also hailed the striker's work-rate and all round play, but has insisted that Welbeck 'has to finish' when he's put through on goal.
Neville continued by saying: "And then obviously the biggest thing, his centre-forward play for outside the box is sensational, his work-rate, his touch, it's just that consistency of finishing and I think that will come from confidence and belief. It's making sure that when he gets in that left channel he has a finish, when he gets one-on-one with the goalkeeper in a central area he has a finish."
Chelsea will be worried
Neville certainly thinks Welbeck has the attributes to cause havoc to the Chelsea defence this weekend, and believes he will become a top centre forward in time.
He finished by saying: "He's unplayable at times, he's a nightmare. He plays against John Terry and Gary Cahill on Sunday - they will not want to play against him. He's quick, he's strong, it's just the last bit has got to be delivered more consistently.
"It was top centre-forward play tonight and if he can get goals more consistently to his game you have got a real top-class centre-forward there."
Welbeck will have to be at his best if Arsenal are going to gain anything from the Bridge this weekend. The Gunners will be determined to secure a positive result against Mourinho's side, with the club already trailing the Blues by six points in the Premier League table.
Chelsea have made a fine start to the season, but come up against the only other side to remain unbeaten in England's elite division so far this term.
Arsenal fans: Do you think Welbeck will get on the scoresheet this weekend? Chelsea fans: Are you worried about the striker? Have your say in the comments section below!