After the joy of welcoming multiple new signings during the January transfer window, Manchester City, Tottenham Hotspur and Aston Villa now face a headache when it comes to their winter signings.

That is because, under UEFA rules, clubs playing in Europe can only register a maximum three new players into their knockout stage squad from their league phase roster.

And they don't have long to decide which ones, with the deadline to register those players coming up on Thursday February 6 at midnight.

That is a problem for those three teams, especially Pep Guardiola's City - who were the Premier League's biggest spenders with four new permanent additions, to the tune of £176.1m.

Villa are also affected by this, with five new arrivals in January - including three loan signings. One of them was Marcus Rashford, arguably the most high-profile move in the transfer window.

The UEFA rules also impact Spurs, who made three January signings - but their situation is further damaged by an injury crisis and a lack of homegrown players in their squad.