Welcome to the Premier League, Kai Havertz.

It has been a delayed introduction; COVID-19, injuries, and illness have all played major parts in that. But the prayers of all Chelsea fans have been answered as the best version of the attacker has finally emerged, and that should be of serious worry to Blues' rivals in the Premier League.

Havertz's display on Monday night in Chelsea's 2-0 victory against Merseyside giant Everton is the same one that set Bundesliga on fire last time out. He is the same player that attracted interest from European heavyweights like La Liga giants Barcelona and Real Madrid as well as Bundesliga champions Bayern Munich before he opted to move to the Premier League giants.

The Havertz that played incredibly well against Everton was exactly the one the Blues signed for a whopping £71 million from Bundesliga side Bayer Leverkusen in last summer's transfer window. Despite his incredible display on Monday night, his past performances this season haven't been forgotten - but there are reasons as to why it has taken until now for the 21-year-old to flourish.

The first is that former manager Frank Lampard didn't appear to have a clear strategy as to how best to utilize the German; the attacker was deployed in central midfield by Lampard as he attempted to find the best role that suits the attacking talent, with BoyleSports continuously displaying odds for every match the German attacker played.

Second, the German was bedbound with the deadly Covid-19 virus for some days in November. Understandably, he needed time to fully recover and fight for his place in the team. Thirdly was an injury he sustained shortly after the arrival of German tactician Thomas Tuchel.

The Everton game was only Kai Havertz's second start under Tuchel. His first start under the German tactician came in Tuchel's first match at Stamford Bridge, and while there were signs of good things to come as per his true potential that faithful night against Wolves, the attacker wasn't able to build on that performance due to the knock he sustained in training before the win against Tottenham Hotspur.

The nature of that particular injury was never revealed by the club or the new manager, but a short break from the team was perhaps what he needed at that point in time. The break took Havertz out of the media spotlight, relaxing the intense expectation that he would instantly improve under the watch of Thomas Tuchel.

He went on to miss five matches, and during this absence the West London club picked up decent results. When the attacker was set to return, there was therefore no need for the manager to throw him into the first XI squad. Tuchel was patient and waited for the right time to relaunch the 21-year-old attacking midfielder.

The re-launch came on Monday night against top-four hopefuls Everton in what was a vital match in the Blues' quest to finish in the top four on the Premier League log. He was deployed as a false nine - a role he played constantly at his former side Bayer Leverkusen - and was supported on the flanks German compatriot Timo Werner and England forward Callum Hudson-Odoi.

Havertz's sleek movement was a constant threat for Everton, and it was exactly what helped him to put Chelsea ahead in the first half of the encounter.

Havertz was then brought down by Toffees goalkeeper Pickford. Jorginho perfectly scored the spot kick, and the Blues went on to win the match and Kai Havertz was named man of the match.

Undoubtedly, he deserves an opportunity against Leeds United on Saturday to build on his Everton display. Momentum is very important and Havertz finally has it at the club - if the manager can harness that, it may be a blistering end to the season for the club and player.