A striker has entered the Premier League for the first time in an illustrious career, who two teams will have particular reason to be wary of.
Samuel Eto'o may be 32, but his goalscoring record in Russia showed he had not lost his magic touch, and given the wealth of talent in the Chelsea side it is little wonder his signing is not being more heralded.
For all the fuss over Romelu Lukaku's loan exit, Eto'o is in the short-term as close as a sure thing Chelsea could have bought.
He has a serious pedigree in his career, the only player to win back-to-back Champions League titles with two different clubs.
In fact the Cameroonian international has won it three times in total, as many as Manchester United themselves.
Eto'o played a key part in Barcelona's triumphs in 2006 and 2009, and don't Manchester United and Arsenal know it.
Arsenal were 1-0 up in 2006 and hanging on for dear life in Paris, before Eto'o broke their resilience with a calmly placed equaliser inside Manuel Almunia's near post after selling him a dummy.
Juliano Belletti crashed in a winner minutes later and Arsenal have never got closer to winning the trophy since.
Three years later Eto'o did it again, but he did not waste any time waiting until the closing stages. He wrongfooted Nemanja Vidic and smashed the ball past Edwin van der Sar to give Barcelona a 1-0 lead over Manchester United.
Lionel Messi added a second half header, and the Red Devils spent the majority of the second half of the final in Rome chasing shadows.
A year later Eto'o did it again. He had transferred to Inter Milan as part of a quite frankly ludicrous swap deal of his services plus cash for Zlatan Ibrahimovic and put another English club to the sword.
He fired Inter past Chelsea, under the guidance of Jose Mourinho as the Nerazurri went onto win the 2010 Champions League.
Fast-forward three summers and the duo are re-united. Eto'o represents a gun-for-hire, and has been selected as Mourinho's weapon of choice, despite a little ageing.
The impact he will have on the Premier League is unclear, but it is hard to bet against him not bagging 20 goals in all competitions last season as even Fernando Torres did.
Whether he shoots them down or not, just the mere sight of Eto'o's name on the Chelse ateamsheet will certainly be enough to make fans of Manchester United and Arsenal feel uneasy and harness some painful memories.
How good can Eto'o be this season?
image: © Jason Bagley