MANCHESTER UNITED captain Wayne Rooney says Jose Mourinho has brought a winning mentality back to Old Trafford.

The Portuguese boss replaced Louis van Gaal over the summer and arrives with a glittering trophy haul that includes 17 major honours including eight league titles in four countries and two Champions League triumphs.

The Red Devils have struggled to compete for silverware since Sir Alex Ferguson's retirement in 2013, despite Van Gaal's FA Cup win last season, but England skipper Rooney thinks Mourinho has helped to correct that.

READ MORE: Manchester United and Germany midfielder Bastian Schweinsteiger announces international retirementThe Herald: Wayne Rooney has been with Manchester United since 2004

"It's always great to get a new manager but when you get someone in the stature of Jose Mourinho he's great to work under and he's brought a winning mentality back to the club," he told Manchester radio station Key 103.

"Manchester United as a football club we have to win and we have to deliver for him.

"There's pressure on the players but we're ready and I think this season we'll give a real challenge on all fronts.

"He's come in, he's been great with the players. The training has been hard but enjoyable.

"We're ready, we're working hard. We know it's a big season for us.

"He's made, in my opinion, some great signings who have gelled in really well with the squad so it's exciting times."

The 30-year-old starts the season needing just five goals to break United's all-time scoring record held by Sir Bobby Charlton but he is already looking at life beyond his playing days.The Herald: Wayne Rooney admits that his game has changed

"I've started taking my coaching badges now so that will probably take about four or five years to complete," he added.

"Of course I've got a lot of experience playing football so I think it would be criminal If I didn't try and pass that knowledge on so hopefully when I finish playing I can get some role as a manager or coach and try and use the experience I've built up over the years."