The 25-year-old Frenchman moved to east London from Eintracht Frankfurt for a club record fee that could rise to around £45 million including add-ons, as reported by the Guardian.
And Mills is expecting him to be a success in England.
Speaking on Sky Sports News (August 9th, 11.50am), he said: “He’s very very good. I’ve been very impressed with him last season and in preseason.
“West Ham will be looking to improve on 10th from last year. Eighth or ninth is not unrealistic.”
Everything in Haller’s game would suggest that Mills is right to believe in him. The big Frenchman is an absolute handful, and the fact that he won 6.9 aerial duels per game for Frankfurt last season, as per Whoscored, should give you a pretty good idea of how bothersome he can be for defenders. Beyond that, that 25-year-old is actually a pretty well-rounded striker. Of his 15 goals last season, only two came with his head, with 11 finding the back of the net from his right boot. In short, he is more than just a target man, and if he can combine that intelligence and instinct for finishing with his natural physical prowess, there is no reason to believe that he can’t be a massive hit for the Hammers during his first year in England.