Ranked! The Premier League's 10 best deadline day deals EVER
10. Asmir Begovic – Portsmouth to Stoke, 2010 (£3m)
The Bosnian signed for Stoke in the 2010 January transfer window and grew in stature from there. While he conceded five goals against Chelsea on debut two months after signing, Begovic improved and eventually established himself as one of the best young goalkeepers in the league.
In November 2013 he also set a Guinness World Record for the longest goal scored, getting on the scoresheet from almost the full length of the pitch against Southampton.
In five-and-a-half seasons at Stoke, Begovic made 173 appearances and kept 50 clean sheets, before departing for Chelsea in summer 2015.
9. Jermain Defoe – West Ham to Tottenham, 2004 (£7m, part exchange)
Defoe enjoyed two stints at White Hart Lane, with a spell with Portsmouth sandwiched in between.
In his first (a deal in which Bobby Zamora went the other way), he made 177 appearances and scored 64 times, and was named the club’s player of the year for 2004 having joined in January of that season.
Spurs at that time were still considered a mid-table club, but with the help of Defoe’s contributions they started to knock on the door for qualification into Europe.
8. Marouane Fellaini – Standard Liege to Everton, 2008 (£15m)
Fellaini made an instant impact in England after joining Everton in September 2008 – not because of his unique hairstyle or flailing elbows, but thanks to his ability to cause chaos inside opposition boxes bombing forward from midfield.
He was named the club’s young player of the year in his debut campaign and gradually established himself at Premier League level under David Moyes’s tutelage. In five years in the blue half of Merseyside, he made 177 appearances and scored 33 times.
It wasn’t a surprise, then, when Moyes brought him to Old Trafford via another deadline-day signing in 2013. That time it cost him almost £28m, though – and the wrath of millions.
7. Robbie Keane – Leeds to Tottenham, 2002 (£7m)
It's fair to say that Leeds probably should have asked a bigger fee from Tottenham for Keane. At just £7m, the Irish striker was an absolute steal.
Keane spent nine years at White Hart Lane in two spells between 2002 and 2011, broken up by a six-month stint with Liverpool (from which Spurs received £19m), plus loans at Celtic and West Ham. In 303 appearances he scored 122 goals – enough for him to rank among the top 10 goalscorers in Spurs history... until Harry Kane came along.
That he was named Spurs’ player of the season on three occasions – including in his debut campaign – outlines Keane's level of performance. A pity, though, that he only lifted a solitary League Cup title in his time there.