Wenger unsure if Alexis Sanchez will start at Chelsea having played the entire 90 minutes against Cologne on Thursday (14 September).
Koeman's Everton will travel to Old Trafford as they face Manchester United on Sunday.
The England international claimed the role as his own during the 2016-17 season.
The former striker hopes United's big spending continues next year.
Nice midfielder was close to joining Barcelona during the recent summer transfer window.
Blues host the Gunners on Sunday following a 6-0 victory over Qarabag in the Champions League opener.
Belgium international has two years to run on current deal and could be available for £25m in 2019.
Participation in the Champions League means the Catalans will not return for the Brazil international.
The 21-year-old still feels "a little bit of pain in his ankle" which he broke last April.
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Catalans reportedly offered him a signing-on bonus to reject a new deal at the Bernabeu.
Ander Herrera, Marouane Fellaini and Michael Carrick tipped to step into the breach.
With Sadio Mane absent, both players are options to come into the starting XI.
Marcelo will still miss Sunday's trip to Real Sociedad, but will be back to face Real Betis.
Josep Maria Bartomeu hailed Catalans' decision against paying £175.8m for Liverpool star Phillipe Coutinho.
Reds have conceded 7 times in their last two matches in all competitions.
Gunners' failure to improve their defence means their Premier League title challenge is doomed to fail.
Nadal currently holds a 1960-point lead over Federer going into the final part of the 2017 season.
Sanchez is expected to leave the Emirates as a free agent at the end of the season.
Josep Maria Bartomeu insisted Messi's father has already signed agreement on behalf of his son.
The Kenya international remains out alongside Danny Rose and Erik Lamela.
Bundesliga club face four charges after including crowd disturbances and setting off flares.
Brook lost to Golovkin in September 2016.
The 21-year-old was also linked with Liverpool, Bournemouth and Crystal Palace.
Wilander believes there is a big difference between Murray and the rest of the Big Four.
The duo have been added to the B list that also includes Rashford, Tuanzebe, Pereira and McTominay.
Carlisle attempted suicide in 2014 and was last seen in Manchester at around 6am this morning
Pogba suffered a hamstring injury on Tuesday and will miss up to six weeks.
Goalkeeper says Gunners will play to win against Chelsea at Stamford Bridge this weekend.
Bisping and Bellew have teased the possibility of facing each other in recent weeks.