The defending champions were put to the sword in Sunday's blockbuster encounter.

Paris Saint-Germain's unbeaten streak in Ligue 1 came to an end on New Year's Day after falling to RC Lens in Sunday night's away encounter. Les Parisians found themselves on the wrong end of a 3-1 scoreline, as their run of 16 games without a recording any loss came to an end.

An intriguing start to the night's affair saw Lens break the deadlock through Frankowski in the fifth minute. The Polish midfielder brilliantly finished off a sweeping move at the back post for his first goal of the season, setting the tone for the rest to follow suit. With Lionel Messi absent and Neymar Jr suspended, the onus lied with Kylian Mbappe to steer PSG on course to a win. However, unlike in the previous win over Strasbourg, the impact of the French striker was barely felt.

Three minutes after the hosts had opened the scoring, it was Hugo Ekitike who restored parity by bundling home a ball from close range. However, in the 28th minute, Lois Openda complicated the task for Christopher Galtier's side by breaking free on a counterattack and bagging a brilliant finish to put Lens ahead. The Belgian international will go on to set up Alexis-Claude Maurice for his side's third goal of the night with a remarkable backheel pass in the visitor's penalty box.

With the result, a title challenge is well and truly on as Lens currently trail leaders Paris Saint-Germain by just four points after 17 games. The Frank Haise's men will travel to Strasbourg for their next league game while the Parisians will welcome Angers to Parc des Princes.