PSG pegged the gap on Ligue 1 leaders Lyon at two points without even playing as the league leaders lost 2-1 at Lille.
After beating Arsenal 3-1, Monaco's next obstacle is a home league match with Paris St Germain.
Caen produced a brilliant late comeback from two goals down to stun Marseille 3-2 at the Stade Velodrome.
From tactics to fitness regimes, Glenn Hoddle recalls playing for Arsene Wenger at Monaco...
Marseille were held at St Etienne as they slipped four points behind Lyon, who moved top with a win at Nantes.
Lorient boosted their Ligue 1 survival hopes with a 2-0 win at home to in-form Bastia.
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