The Welshman left his coaching role at Old Trafford over the summer.
But Aaron Ramsey will miss the Gunners' next three games with a hamstring injury.
Rooney has been widely criticised for his sub-par performances in recent weeks.
Arsenal manager refrains from criticising Mourinho after comments contained in new book.
Mourinho and Wenger have frequently clashed with each other over the years.
Rooney has started in the number 10 role in six of the seven games thus far this season.
Robins boss Lee Johnson believes the 18-year-old is a "real handful" after netting nine goals in 11 games.
Novak Djokovic will next play the China Open, which starts on 3 October.
Former England captain denies agenda-motivated criticism of Trott's withdrawal from 2013-14 Ashes tour.
Loris Karius made his competitive debut for Liverpool against Derby in the EFL Cup.
Merson says Mourinho still cannot find his best team at Manchester United.
Arsenal's last league win over Chelsea was in October 2011.
Stan Wawrinka faces Viktor Troicki in the quarter-final of the St Petersburg Open on 23 September.
Manchester United and Leicester City face each other in the Premier League clash on Saturday.
Luke Shaw was diagnosed with a slight groin tear following United's loss against Watford.
Marc Marquez leads the riders' championship standings.
Butt was the second highest scorer in Pakistan's National T20 cup.
Only a result on day four at Lord's can deny Somerset a first championship title.
Brazilian is currently on loan at Sporting Gijon.
Wales are concerned midfielder could miss World Cup qualifying double-header in October.
Los Blancos travel to Canary Island on Saturday before a Champions League clash with Borussia Dortmund.
London has already hosted NFL and NBA games in recent years.
Danny Murphy says Mourinho was disappointed to be overlooked for Rafael Benitez.
Trott left England's 2013-14 tour of Australia because of a stress-related illness.
Boro host Spurs following two consecutive defeats to Everton and Crystal Palace.
Wenger arrived in England on 22 September 1996 to take charge of Arsenal.
The Foxes stopper suffers muscle injury after recovering from concussion but Papy Mendy out.
Spaniard has been left out of the Catalans' squad for the last three games.
Arsenal welcome Chelsea to the Emirates Stadium on Saturday (24 September).
Rome's withdrawal as a candidate for the 2024 Games highlights risks attached to being host city.