The Gunners midfielder says he knows Xhaka's game well and believes he is a strong addition to the side.
The midfielder has seen his time at Villa severely hampered by long-term injury problems but is back fully fit this summer.
The defender completed a move from Liverpool on Wednesday.
A look at how Nottingham Forest could look to benefit from their manager's friendship with the Tottenham Hotspur boss.
We take a look at three Everton players Hull City could sign if Roberto Martinez becomes manager.
Leeds have reportedly handed a trial to Gabriele Perico.
Wolverhampton Wanderers midfielder is said to be of interest to Newcastle United.
All the latest transfer stories surrounding Everton.
20-year-old O'Connell made his European debut for the Bhoys on Wednesday.
Garry Monk has spoken of Leeds United's need to strengthen in multiple positions, and Armand Traore would be an ideal signing.
West Bromwich Albion missed out on the Frenchman, so have now switch their attention to Hull City midfielder Jake Livermore.
The Tottenham Hotspur teenager is closing in on a return.
Sam Byram impressed for West Ham United against Crystal Palace on Saturday afternoon.
The young centre-back is yet to feature on a regular basis for Manchester City and Celtic could take advantage.
Middlesbrough forward Jordan Rhodes needs to kick start his career and where better than an Aston Villa side in need of a poacher?
Liverpool hesitated over signing Virgil Van Dijk from Celtic, which enabled Southampton to do a deal for the centre-back.
Could Chelsea make moves for Tottenham Hotspur duo Dele Alli and Harry Kane in the January transfer window?
Leeds United won against Derby County in the Championship on Friday evening.
Aston Villa have reportedly made a move to sign Barnsley star Conor Hourihane.
Could West Ham United lose Dimitri Payet in the January transfer window?
Owen Smith has copied his new policy ideas on workers’ rights from Jeremy Corbyn, the Labour leader’s campaign team has suggested.
Zinedine Zidane has hinted Real Madrid could swoop for Paul Pogba despite Manchester United’s willingness to pay a world record fee for the midfielder, with the head coach saying his club are always in the market for the finest footballers.
Teams competing in the FA Cup will be able to field a fourth substitute from the sixth round onwards in the competition this season, the Football Association have announced.