Alexis Sanchez
Alexis Sanchez is unhappy at Arsenal after falling out with Mesut OzilGetty

Arsenal star Alexis Sanchez is reportedly unhappy with life in north London and has fallen out with fellow big-money signing Mesut Ozil.

According to the Express, the Chilean star, who signed from Barcelona for a reported £32m has not adjusted to his new surroundings and has also fallen out with a few of the Gunners' players.

One of the players he is said to have argued with is Ozil, Arsenal's club-record signing. The report claims Sanchez is aggrieved about a perceived lack of on-pitch support from the German playmaker.

Sanchez has become an immediate hit with the Gunners fans and has settled well on the pitch having already scored five goals and provided two assists in eight Premier League games. He was voted Arsenal's Player of the Month for October by the club's fans.

Ozil, who is currently recovering from a knee injury, has been linked with a move away from the club in the January transfer window. Bayern Munich and Manchester City have been touted as potential destinations, as the report claims he is unhappy with the manager for playing him on the wings rather than his favoured number 10 role.

Meanwhile another new signing, Calum Chambers, who arrived at Arsenal from Southampton, has admitted that he is surprised at how fast everything has happened.

Chambers, who until recently was the reserve right-back at St Mary's, has already become a fan favourite after putting in some assured performances for the club and he has also made his debut for the England senior team following his arrival at the Emirates Stadium.

"When you get the opportunity to come to a club like this you can't turn it down. How quickly it has all happened for me, I have been a bit surprised [by that]," Chambers told Arsenal's official site.

"Everyone has welcomed me so well that it has made it easier for me to settle and be as confident as I am here.

"At the start it was a whirlwind, it was all new. I had been at Southampton for 12 years, but I am starting to settle down now. All the lads and the staff at the club have been great towards me and I am really starting to find my feet."