Jose Mourinho’s Red Devils travel to north London having won ten of their 14 league games and scoring 32 goals in the process.
United have put four goals past six opponents this season and Wenger admits there will be pressure on Arsenal’s defenders to stand up.
‘They look to be a strong team,’ Wenger said. ‘They have power, they have a lot of power up front. Every player has power.
‘[Romelu] Lukaku, now [Zlatan] Ibrahimovic is back you can’t say this guy lacks power, [Marcus] Rashford, [Anthony] Martial, they have power.
‘So our defensive performance will be important when we don’t have the ball against them.’
Arsenal legend David Seaman, meanwhile, believes England international Rashford will pose the biggest threat to his former side.
The 20-year-old has enjoyed a productive start to the 2017-18 campaign, scoring seven goals and providing four assists in 13 starts and eight substitute appearances.
‘There’s a few to be wary of. Obviously people would think of Lukaku but for me, Rashford is the one,’ Seaman said.
‘He’s unpredictable, he can score goals and he’s fast and he’s got a great free kick in him.
‘He can hit it and he hits it a little bit like Ronaldo does, they get the valve so that’s where their foot hits it and it makes the ball wobble and swerve- even more than it normally does. So for me, Rashford is the one.’