Arsenal were beaten by Manchester United on Sunday and they take on Tottenham Hotspur next.
The Gunners travelled to Old Trafford on Sunday looking to bounce back from a demoralising loss to Barcelona in the Champions League.
Instead, they were on the end of a 3-2 loss to a youthful Manchester United side, as striker Marcus Rashford’s double saw his team to victory.
Arsene Wenger’s side have been roundly criticised for such a poor performance by many, and Parlour says it was down to a lack of leaders on the pitch.
"I didn't see anyone on that pitch demanding more from the players,” he told Sky Sports.
“The big players didn't turn up. The most important thing is the leaders. When I played we had Tony Adams and guys like that demand more from you when you're up against it.
"Swansea on Wednesday is now a massive game for them and then they play the north London derby, and at the moment, Spurs are looking a much more complete team than Arsenal."
That upcoming game at White Hart Lane is certainly looking a huge one now, with it sure to play a key part in who wins the Premier League title.
At this moment in time Tottenham currently look the favourites as they sit three points ahead of their rivals in second place.
Indeed, they have impressed all season, with Mauricio Pochettino’s side having gone about their work in a quiet and effective manner so far to turn themselves into genuine title contenders.
However, Wenger’s side did step up and beat Leicester in a similarly crucial game and they will be hoping they can do a similar job this weekend.