Chelsea turned on the style in the second half with goals from Armando Broja, Thiago Silva, Enzo Fernandez and Raheem Sterling, to beat Preston North End 4-0 and progress to the next round of the FA Cup.
For large parts of the first half, it was the Championship side who looked up for this game, forcing Petrovic into two saves and finding ways to quieten the home fans. Every tackle from someone in red was met with a cheer as Chelsea struggled to find momentum and consistency in the first half.
Fair to say that the best Chelsea player was young Alfie Gilchrist who made four blocks and won three attempted tackles in that half. He also gave the fans something to hold on to in the cold when he was on the ball.
The atmosphere at Stamford Bridge hasn't been great in the last couple of years and in the depths of winter coupled with train strikes some fans left at halftime, before Armando Broja headed home the first goal, from a brilliant Malo Gusto cross to give Chelsea the lead.
The magic of football is in the goal, all of a sudden Stamford Bridge regained its voice, and the song of Thiago Silva reverberated across every corner of the stadium.
The Brazilian, a second-half substitute is defying the odds by playing at this level at age 39 and it was his goal which put the game to bed before Raheem Sterling reminded everyone of his ability with a stunning free-kick and Enzo Fernandez crowning it all with the fourth.
This was a second-half mauling and Pochettino deserves credit for getting his team to respond after a very poor first half. This is how we rated the Chelsea players out there.
1. Djordje Petrovic -6
Made a brilliant save to deny Wilson in the first half and took cross with so much ease . | Getty Images
2. Levi Colwill- 6
Put in Chelsea's first cross of the game and despite a nervy start to the game finished strongly. | Getty Images
3. Thiago Silva- 6
His passing, anticipation and decision making still as shinny as anyone out there. There are occasions where he gets caught out by pace but still just an important player. | Getty Images
4. Conor Gallagher-5
Difficult first half where he battled well but was missing the final touch. | Getty Images