Manchester United will 'create havoc' this season insists Andreas Pereira

Andreas Pereira has revealed that a number of things have changed at Manchester United since the arrivals of Jose Mourinho, Zlatan Ibrahimovic and Paul Pogba this summer. The Red Devils have struggled after the departure of Sir Alex Ferguson in 2013 and have changed three managers since.

The 20-time English champions have failed to qualify for the Champions League in two out of the three seasons and finished fifth last campaign, which saw Louis van Gaal sacked. The Portuguese manager has since taken over and made changes to the personnel, which has seen them start the season in fine form wining all three of their Premier League games thus far.

Mourinho spent just under £150m ($200m) during the summer transfer window, which included the world-record fee to sign Pogba from Juventus, while he also captured the signing of Ibrahimovic from Paris Saint-Germain on a free transfer. The former Sweden international has already begun repaying the faith shown by his manager and scored three goals in as many games in the Premier League.

Pereira, who is currently on a season-long loan at Granada, is confident that United will be a different beast under Mourinho this season, and also revealed Ibrahimovic's level of dedication when it comes to the game despite having won league titles with every club he has represented thus far in his career.

"Things have changed a fair bit," Pereira told GloboEsporte, as quoted by the Manchester Evening News.

"Ibra arrived. Pogba arrived and that was a bit strange... it was like he was coming back from a long holiday! The new players will help the team a lot. It's really different since Mourinho's arrival - everyone is more focused and prepared to play. I think this year Manchester United will create havoc.

"When he arrived, everyone could see that he was a real professional. Just by his physical appearance, you can tell he is professional as hell. He just wants to win – he only thinks about football.

"He brought his own physiotherapist with him, to treat him at the club. Everyone was left open-mouthed by that," the United midfielder explained.