Arsenal fans were given something to worry, as Alexis Sanchez  could reportedly demand a buy-out clause in his new deal

The 27-year-old has just two years left to run on his current contract and the club are already trying to get him to put pen to paper on fresh terms in north London. And he could demand a fixed-price get-out clause in any new Gunners deal.

When asked for an update on contract talks in August, Wenger told Sky Sports: “No. We keep that internal. We make progress always, but it is not always a quick process. They still have two years [left on their] contracts and there is no urgency as well.

“They (Arsenal fans) have no reason to be concerned. At the moment we have priorities, and most of the time contract extensions are done outside the transfer window because it gives you a bit more time and focuses on that.”

Sanchez joined the Emirates club in the summer of 2014, arriving from Barcelona for a fee of £35m.

The Chilean international netted an impressive 42 goals during his first two seasons with the club and opened his account this term in a 3-1 win at Watford last weekend.

Meanwhile, Arsenal have revealed the squad numbers they have handed to £52million worth of new signings – Shkodran Mustafi and Lucas Perez.

The Germany international will wear the No.20 shirt this season after signing from Valencia.

Arsenal boss Arsene Wenger was delighted to have landed his long-term target on deadline day and said of Mustafi: “He is at the right age. He has a good experience.

“He is a very focused player who can play with the ball as well. We have taken great player have prepared well for the future.”

While fellow new boy Lucas Perez, who arrived at the Emirates Stadium on the same day from Deportivo La Coruna, has also received the No. 9 shirt.

The 27-year-old Spaniard moved to the Emirates for a fee believed to be in the region of £17m to bolster the Gunners’ offensive options.

In addition to Mustafi and Perez, the Gunners have signed Granit Xhaka, Rob Holding, Takuma Asano and Kelechi Nwakali during this summer transfer window.