Son Heung-min scored a stunning goal and set up another as Tottenham booked their place in the FA Cup fourth round at the expense of Leicester.

With both sides flying high in the Premier League, it promised to be a closely fought replay after the sides drew the first match.

But Spurs were barely troubled and took the lead in the 39th minute when Son's 18-yard strike beat Kasper Schmeichel.

Nacer Chadli made it 2-0 when he converted Son's precise through ball.

The north London side travel to League One strugglers Colchester United in the fourth round.

It was probably the best 83 minutes of Son's Tottenham career so far.

The £22m summer signing from Bayer Leverkusen was the one bright spark in attack on a night when both sides lacked bite up front.

With Tottenham pairing Harry Kane and Dele Alli and the Foxes' Jamie Vardy and Riyad Mahrez starting on the bench, it was up to the 'cup players' to prove they were also worthy of a place in their Premier League starting XIs.

For Tottenham, who made eight changes, Son's claim was the strongest. He did what his team-mates struggled to do for almost 40 minutes - penetrate the Leicester backline when he shifted past defender Ben Chilwell before scoring with a ferocious dipping strike.

And his assist for the second was also a thing of beauty. After collecting substitute Kane's pass from the left, Son nutmegged Yohan Benalouane with his ball for Chadli, who fired beyond Schmeichel.

'Tinkerman' Claudio Ranieri repeated much of what he had done before the first match by making nine changes from the previous league match.

As in the first game, his side were content to let Tottenham dominate possession seemingly in the hope of catching them on the break.

However, the plan failed. The Spurs midfield quelled the threat of wingers Demarai Gray and Nathan Dyer, and in doing so cut off the supply line for lone striker Leonardo Ulloa.

Shinji Okazaki and Marc Albrighton were brought on after the break, as in the match at White Hart Lane, and improved matters. Albrighton had the Foxes best chance of the match when he forced a good low save from the otherwise redundant Michel Vorm.

In defence, Chilwell should perhaps have closed down Son for the opener, but he was Leicester's best player. The youngster was exceptional as an attacking full-back - the highlight a mazy first-half run that won his side a free-kick.

But it is now only one win in seven games for the Foxes in all competitions - is this more than a blip?