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.

Chelsea have been fined up to £78.5million for failing to comply with UEFA’s Financial Fair Play rules — and could face restrictions on registering new players to compete in the Champions League next season. The Blues must pay a minimum of £26.7m, plus up to £51.8m in conditional fees.

Chelsea was fined a total of 31 million euros ($36.5 million) for breaking financial monitoring rules by UEFA on Friday to hit a record sum for a European club penalized in a single season. Barcelona also was ordered to pay 15 million euros ($17.