The Frenchman has Laurent Koscielny, Per Mertesacker, Calum Chambers and Gabriel as central defensive options and says he is not in the market for another defender.
“Four is enough,” Wenger said. “(Mathieu) Debuchy can play there, (Nacho) Monreal can play there, so you can say we are not out to buy a central defender.
“And Gabriel will be a great central defender, believe me.”
Arsenal have won nine of their games in an unbeaten 10-match run ahead of Monday Night Football’s clash with Swansea at the Emirates.
The exception was a goalless draw with champions Chelsea in the Gunners’ last home fixture and Wenger will be targeting another three points against the Swans in an effort to cement an automatic Champions League spot.
“We can win (the title), of course we can win,” he added. “We have done it before. Manchester United have done it. Plenty of teams have done it.
“It is how well you play, the kind of game you play. For example, you don’t question Barcelona about the way they play football.
“But if they start to lose games you will question ‘Are they not too naive?’. But when they win you don’t question it of course.
“You cannot play 38 games in the same convincing style. You need to have a balance in your team so that if you are not at a level of fluency you can still win the game.
“Then most of the time it is the individual talent of the players.
“You have to accept that at some level – unfortunately – the game becomes an individual sport.”