From Callum Hudson-Odoi to Idrissa Gueye and Ivan Perisic - the deals which didn't get over the line...
Idrissa Gueye to PSG
Everton rejected a last-gasp £26.2m bid from Paris St-Germain for Idrissa Gueye on Deadline Day. The midfielder had handed in a transfer request to try to force through a deal after PSG's initial £21.5m bid was snubbed.
The Senegal international is understood to be very upset the move never materialised, but he has become a key player for Everton boss Marco Silva - he is top of the club's standings for tackles and interceptions - and the manager clearly felt he couldn't afford to lose Gueye at this time.
Ivan Perisic to Arsenal
Arsenal seemed to be closing in on a loan move for one-time Manchester United target Ivan Perisic earlier this week. The Gunners were willing to pay a fee to take him on a temporary basis until the end of the season, but Inter Milan refused to sanction the deal unless they agreed to buy him at the end of it.
Perisic's speed, goal threat and experience were appealing to the Gunners, who wanted to add width to their squad as they chase a top-four spot, but, perhaps understandably, they did not want to commit to purchasing a player who turns 30 on Saturday. The Croatia international might now have missed his opportunity to come to the Premier League.
Yannick Carrasco to Arsenal
Arsenal were also interested Yannick Carrasco, another wide player with speed and one-on-one ability. The Belgium international, formerly of Monaco and Atletico Madrid, now plays his football with Dalian Yifang in China, which made the logistics of the deal difficult.
Arsenal faced competition from AC Milan, where their former chief executive Ivan Gazidis now operates, but in the end Carrasco stayed put. Arsenal's loan deal for Barcelona's Denis Suarez was their only signing of the winter window.
Callum Hudson-Odoi to Bayern Munich
Bayern Munich's pursuit of Chelsea teenager Callum Hudson-Odoi was one of the most protracted transfer sagas of the January window. Having seen the success of Hudson-Odoi's England youth international team-mate, Jadon Sancho, at Borussia Dortmund, Bayern were eager to poach their own rising star from the Premier League, but in the end the Blues held firm.
Hudson-Odoi's transfer request was rejected and so too were Bayern's offers. The 18-year-old was given first-team opportunities as his boyhood club attempted to win him over - there was even a goal in their FA Cup win over Sheffield Wednesday - but he was not even in the squad for their 4-0 loss at Bournemouth on Wednesday night.
Given his apparent reluctance to sign a new contract at Chelsea, and Maurizio Sarri's unwillingness to trust him in the big games, Hudson-Odoi's future is likely to come back onto the agenda in the summer.
Marko Arnautovic to Shanghai SIPG
West Ham were rocked by interest from Chinese outfit Shanghai SIPG in their prized asset Marko Arnautovic. The Austrian has become a key figure for the Hammers since his arrival from Stoke at the start of last season, but his head was turned by the lucrative offer from the Far East.
Arnautovic appeared to wave goodbye to the West Ham fans when he was substituted during their meeting with Arsenal at the start of the month, but a few weeks later he was pledging allegiance to the Hammers again. He insisted it was his choice, but other reports suggested the Chinese club simply weren't willing to meet West Ham's valuation.
Either way, he came out of it with a contract extension.
Willian to PSG
Deadline Day brought news of interest in Willian from Paris Saint-Germain. The French giants considered a move for the Chelsea star after losing his countryman Neymar to injury for 10 weeks, but the Blues never displayed any willingness to do business.
Willian, who also attracted interest from Barcelona during the summer, will now remain at Stamford Bridge until the summer. What happens then remains to be seen.
Vincent Janssen to Schalke
Vincent Janssen's Tottenham nightmare continues. The Dutchman has not made a single senior appearance all season and does not feature in Mauricio Pochettino's plans, but he now looks set to see out the remainder of the season there.
Talks over a loan move to German side Schalke were unsuccessful, while interest from Spanish outfit Real Betis and Premier League strugglers Cardiff also came to nothing. It leaves Janssen, an £18.6m signing from AZ Alkmaar in 2016, in limbo until the summer.