Wolfsburg star Kevin de Bruyne must be making Chelsea boss Jose Mourinho wish he'd tried harder to incorporate the attacking midfielder into his Blues squad.
Sold last summer by the Portuguese after he and the player fell out regarding first team opportunities, the former Genk man has proved himself one of Europe's best in his 18 months in Germany.
That form has seen De Bruyne linked with a return to the Premier League, with Manchester City, Manchester United and Liverpool all being credited with an interest in the Belgian at one point or another this season, in publications like the Star.
And the reason why is clear, the 23-year-old's 21 league assists for Bundesliga runners-up Wolfsburg is the joint-highest in the big European leagues this season and the highest ever in Germany.
No player has created more goals for their side than the man Chelsea deemed not good enough last year, with the Belgium international ahead of Blues star Cesc Fabregas on 19 and level with Lionel Messi.
And that's just in the league, De Bruyne has 28 assists across all competitions, and has also scored a phenomenal 16 goals for the Wolves, 10 of which were in the league.
That means he was involved in 38 goals in 34 Bundesliga games, or 53% of the 72 goals Wolfsburg scored.
No wonder Manchester City are interested in him, but they will face a challenge recruiting him from the Saxony club, after chairman Francisco Javier Garcia Sanz stated there would be no departures from the club's impressive German Cup winning squad, as the Manchester Evening News reported this week.
But, if he was to end up at the Eithad at some point, even Mourinho might admit that he made a mistake.