Chelsea and Aston Villa have been fined by Uefa for breaching the European governing body's financial rules.The two clubs could be prevented from registering new players for Uefa competitions for the forthcoming season unless they have a positive transfer balance by the end of the summer transfer window.

Enzo Maresca’s Chelsea – who are set to play in the Champions League next term – are one of nine sides that have been slapped with a significant fine by UEFA for breaching financial sustainability rules in the years ending 2023 and 2024.

Chelsea have been fined €31m and could be fined a further €60m if they do not comply with the rules in the next four years. Villa have been fined €11m, with a further €15m conditional on compliance in a three-year period.