Manchester United great Paul Scholes admits he's been won over by Lisandro Martinez.
Martinez was again highly effective during United's 3-1 win over Arsenal on Sunday afternoon but he was forced off with 10 minutes remaining after appearing to hurt his groin clearing the ball.
Scholes said: "At United it's about the determination more than anything.
"You know the talent is there but it's about getting up to people, stopping people, getting up to people, being solid at the back.
"Having that solid back four now is helping them. Martinez coming out of that might be a worry going forward.""