Koscielny injured his knee against Leicester on Wednesday night late on with the scores level at 0-0, but played on and finished the game as Robert Huth's own goal handed Arsenal an important 1-0 victory.
Wenger said on Friday that Koscielny had a 60 per cent chance of starting Sunday's clash with Premier League rivals Spurs - the final north London derby to be held at White Hart Lane.
The French coach revealed that news over the centre-back's recovery was "positive", and Koscielny was back in training with his team-mates on Saturday.
While Koscielny may start in a new-look three-man defence which has helped Arsenal record three straight wins, Shkodran Mustafi is still "two weeks away" with a thigh injury that has sidelined him since the 3-0 loss against Crystal Palace earlier in April.
Rob Holding is in contention to start against Spurs, though Wenger deployed Nacho Monreal as his left-sided centre-back against Leicester.