Christopher Nkunku baffles fans by blowing up balloon as goal celebration after scoring for RB Leipzig

Christopher Nkunku has baffled fans with a bizarre goal celebration in the Champions League.

Nkunku, 24, continued his impressive form with the opening goal for RB Leipzig against Shakhtar Donetsk on Wednesday night.

Leipzig still had a slim chance of topping their group if they beat the Ukrainian side and leaders Real Madrid dropped points at home to Celtic.

They made the perfect start to their match against Shakhtar, with France international Nkunku putting them ahead in the 10^th minute of the game.

After firing the visitors in front, Nkunku pulled a red balloon out of his sock.

He then proceeded to blow it up before posing with it in his mouth.

It was certainly one of the more unique goal celebrations seen in the Champions League.

And fans of the French striker were quick to react on social media.

"Need an explanation behind Nkunku's balloon celebration," posted one fan on Twitter.

Another added: "What? Did he just blow a Balloon?? Hahaha."

While a third wrote: "Nkunku has a balloon in his sock that he blows up when he scores? Hall of fame stuff."

French journalist Fabrice Hawkins later explained that Nkunku had performed the celebration as a promise to his two-year-old son.

Leipzig would go on to win the match 4-0, booking their place in the last 16 of the competition - albeit as runners-up to Madrid, who thrashed Celtic 5-1.

Nkunku's goal took him to 14 for the season, form which has reportedly convinced Chelsea to sign the striker.

The Athletic claim the 24-year-old has already signed a pre-contract agreement with the Premier League club.

Chelsea are also said to have agreed to pay Leipzig a fee "in excess" of Nkunku's €60m (£52.7m) release clause, which can be activated at the end of the season.

The Blues have agreed to pay a higher fee for Nkunku in advance to avoid a potential bidding war for the striker in the summer.

A former Paris Saint-Germain player, Nkunku left the French club to join RB Leipzig in 2019.

He has since gone on to score 61 goals in 156 games for the German side, including the opener against Shakhtar.