There aren’t many footballers in the world who are faster than Kylian Mbappe.The Paris Saint-Germain and France forward, who is still just 19 years old, must be every defender’s worst nightmare to play against - especially in a one-v-one situation.He’s not just lightning-quick, either; he’s also seriously talented with the ball at his feet. PSG paid AS Monaco a cool £166 million for the French starlet’s services in September 2017 and that already looks like money well spent.The teenager, who won the World Cup with France in the summer, has already scored an impressive 34 goals in 55 appearances for PSG.He failed to get on the scoresheet against Napoli in the Champions League on Tuesday evening but did provide the assist for Juan Bernat’s opener.Lorenzo Insigne’s second-half penalty, however, denied PSG what would have been a precious victory.It’s now all to play for in Group C following Liverpool’s shock 2-0 defeat against Red Star Belgrade.Back to Mbappe at the Stadio San Paolo for a moment, though, and if any defender wants to know how to stop Mbappe they should just watch this glorious piece of defending by Kalidou Koulibaly.Mbappe had Koulibaly right where he wanted him: high up the pitch with loads of space behind him and only the goalkeeper to beat.The youngster took a touch before attempting to utilise his explosive pace.Koulibaly, who is eight years older than Mbappe, did exceptionally well to turn, run and then produce an inch-perfect sliding tackle.Watch Koulibaly’s magnificent defending here…

That has to be a contender for tackle of the season.

No wonder some football fans reckon the Senegal international is currently the best defender in the world.

Here’s how football fans on Twitter reacted to Koulibaly’s tackle…

The 27-year-old used more unorthodox methods to stop Mbappe when the two teams met in Paris two weeks ago.

The 6ft 5in centre-back shoved teammate Mario Rui into the Frenchman’s path and the footage went viral online.

You can watch that funny moment here…

Is Kalidou Koulibaly currently the world’s best defender? Have your say below.