Wenger says Monreal is an important player at the club due to his versatility.
The Germany international missed draw at Stoke City with foot problem but is set to return.
Midfielder recently scored his first goal in senior football during a 6-0 thrashing of Charlton.
Wenger has Olivier Giroud, Theo Walcott, Alexis Sanchez and Danny Welbeck to play up-front.
Koscielny has in the past been linked with Bayern Munich and Real Madrid.
The 67-year-old pundit thinks his former club have a 'fantastic chance' of winning the title.
Arsene Wenger says his side showed new character to hold Stoke City at the Britannia Stadium.
Live coverage as Arsenal look to return to the top of the Premier League table.
However, Steven Ireland and Phil Bardsley are available again
The Argentine defender believes the game at Anfield could be decisive this season.
The former AC Milan striker has been heavily linked with a move to the Premier League.
Arsenal manager praised his new singing from FC Basel ahead of Stoke City clash.
Sanchez has recovered from a hamstring injury while new signing Mohamed Elneny is also available.
French boss would prefer to have his injured players back than make a second dip into the market.
Guardiola says his next job will be in the Premier League.
Elneny completed his move tot he Gunners on Thursday.
Egyptian international has finally arrived at the Emirates Stadium after deal was held up by paperwork issues.
Six-goal thriller between top-flight giants highlighted the beauty and flaws of the campaign.
The former Manchester United and England defender thinks the Gunners need more muscle in midfield.
The France international posted via Snapchat the blow he sustained in the first half at Anfield.
The 29-year-old striker has admitted he was left feeling frustrated by their 3-3 draw at Anfield.
The Gunners failed to defend a long ball in the dying minutes as Joe Allen rescued a point at Anfield.