LONDON, March 17 (Reuters) - ⁠Defending champions Paris St Germain humbled Chelsea 3-0 at Stamford Bridge on Tuesday, ⁠laying down the gauntlet for European challengers with a crushing 8-2 aggregate ‌last-16 victory in the Champions League.

The French side, playing with Gallic brio, took six minutes to open their account when first-leg substitute hero Khvicha Kvaratskhelia added a third goal to his tally in the tie, pouncing ​on an all too familiar Chelsea defensive blunder, this ⁠time by Mamadou Sarr.

It was the ⁠Georgian's arrival on the pitch in Paris a week ago that heralded Chelsea's Champions League ⁠demise ‌when they conceded three goals in a whirlwind last 15 minutes to put the tie out of reach.

On Tuesday they had to attack, which only ⁠highlighted their defensive frailties.

They were caught on the counter-attack in ​the 15th minute with a ‌fine finish from Bradley Barcola and 19-year-old PSG substitute Senny Mayulu added a ⁠third in ​the 62nd minute.

Chelsea laboured in front of goal with 18 shots, half of them on target. PSG goalkeeper Matvei Safonov did pull off two good saves just before halftime but he was ⁠not otherwise greatly challenged.

Chelsea coach Liam Rosenior, who must ​now focus on qualifying for the Champions League next season, substituted his top players Cole Palmer, Joao Pedro and Enzo Fernandez before an hour had been played.