Paris Saint-Germain slumped to a dismal 2-0 defeat against Rennes in Ligue 1, with Karl Toko Ekambi and Arnaud Kalimuendo netting to amplify the pressure on Christophe Galtier.
PSG were booed off at half-time by the Parc des Princes crowd after Toko Ekambi broke in behind to hand Rennes a surprise lead, following a series of misses from Kylian Mbappe.
Things quickly went from bad to worse for the disjointed leaders, with former PSG forward Kalimuendo converting Lesley Ugochukwu s cross to provoke more fury from the home fans.
PSG s four-game winning run in Ligue 1 ended with a whimper as Rennes stood firm, and Galtier s under-fire side could see their lead at the summit reduced to seven points when Marseille visit Reims later on Sunday.
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Mbappe endured a miserable first half for PSG, seeing a one-on-one finish disallowed for offside 22 minutes in before squandering three good opportunities.
Having drilled one left-footed effort narrowly wide, Mbappe was twice released in behind by measured throughballs from Lionel Messi, only for Steve Mandanda to deny him with firm saves.
Mbappe s misses were punished on the stroke of half-time as Rennes scored against the run of play – Toko Ekambi latching onto a simple ball over the top to fire into the bottom-left corner.
PSG found themselves 2-0 down within three minutes of the restart, Kalimuendo side-footing home after Marco Verratti s giveaway allowed Ugochukwu to break down the left.
Toko Ekambi and Kalimuendo almost claimed braces as Rennes continued to press – the latter denied by a one-on-one save from Gianluigi Donnarumma.
Verratti forced a flying save from Mandanda late on, but that was as close as PSG went.