The club captain has found himself frozen out in recent weeks.
Wenger said: â€œThomas is one of the best defenders in England, like the two others.
â€œI told them at the start of the season that we have three outstanding central defenders.
â€œItâ€™s about game by game that I make a decision â€” and it is about partnership as well.
â€œThomas has been a substitute for quite a few games and he still plays a big part in the game â€” I donâ€™t see him as a substitute at all."