Alexis Sanchez-Mesut Ozil
Alexis Sanchez and Mesut Ozil are the two key players for ArseanlGetty

Arsenal legend Martin Keown claims his former club will struggle to keep the star duo of Alexis Sanchez and Mesut Ozil at the Emirates if the Gunners fail to strengthen the squad in the summer. The attacking players will have two years left on their contract after the end of the ongoing season.

Arsene Wenger had earlier admitted that the Chilean international and the former Real Madrid midfielder's future will be resolved in the summer. The Frenchman remains confident that both Sanchez and Ozil will agree to extend their contract.

Last summer, Arsenal only signed Petr Cech after the goalkeeper moved to the north London club from Chelsea. Keown fears Sanchez and Ozil could leave in the upcoming window if the Arsenal manager fails to strengthen the squad for the 2016/17 season.

"It'll be a lot easier to sign Alexis Sanchez and Mesut Ozil to new deals if the team is being supplemented with top talent. Arsenal have stopped bleeding players, but it could happen again if Arsene doesn't recruit well now," Keown told the Daily Mail, as quoted by Goal.com.

Sanchez has reportedly been attracting interest from Bayern Munich as their incoming manager Carlo Ancelotti wants the ex-Barcelona forward at the Allianz Arena. The Italian has made the attacker his priority target in the summer.

Keown has criticised Wenger and suggested that Arsenal's failure to mount a title challenge is down to their manager for overestimating the quality of his players. The Gunners favourites have urged the Emirates club's boss to add more quality to the squad in order to make Arsenal the genuine title contenders.

"I think he'll be active in the transfer market. One thing I am sure of is that Arsene will want to leave while he's on top, and unless they win the title next season, he can only do that if he earns a new contract," he added.

"Because of this I think he'll be busy in the transfer market this summer, and one thing he needs to decide is whether his squad has the right experience to win the title.

"Coquelin and Elneny have done well, but does he want a more experienced player in the heart of his midfield? Laurent Koscielny and Gabriel are both good defenders, but is the partnership good enough for a title-winning defence?

"If there's one thing Arsene has been guilty of over the years it's overestimating the quality of his players, and I'm not sure he can afford to do that when he is in need of instant results."