Chelsea were unaware of the change in EFL Cup rules: Guiu could play, but he was excluded.

Mark Guiu allowed to play in EFL Cup

According to The Sun: Chelsea striker Mark Guiu can participate in the EFL Cup due to an unexpected change in the regulations, which came as a real surprise to the club.

This season, the teenager briefly played on loan at Sunderland, but he was recalled to Chelsea before the transfer window closed.

Guiu scored in the EFL Cup match for Sunderland against Huddersfield, but doubts arose about whether he could play in the subsequent matches of this tournament.

However, changes in the rules for the 2025/26 season have allowed players to represent two different clubs in the same tournament.

Chelsea were not aware that the Spaniard could play in the Cup match against Lincoln City on Tuesday, so he was not included in the squad. He can now be part of Chelsea manager Enzo Maresca's plans for the remainder of the competition if the team continues its journey at LNER Stadium.

This tournament could become an important opportunity for the young striker, who was loaned out, as he was not in Maresca's plans for this season.

Guiu was recalled after a serious injury to main striker Liam Delap ahead of the international break.

Niklas Jackson replaced the Englishman, but is already close to concluding a loan deal with Bayern Munich. Although Chelsea initially tried to cancel this agreement, the club ultimately decided to revert to Guiu, whose status at Sunderland became uncertain due to the club's activity in the transfer market.

The club from the North East signed striker Brian Brobbey to strengthen their attacking line, where Wilson Isidor and Eleazar Mayanda are already playing.

THIS IS A DEVELOPING STORY...

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Mark Guiu's inclusion in Chelsea's squad could be an important milestone in his career. He has the opportunity to showcase his abilities at a high level, while the team can fill a possible gap in attack. As this story develops, Chelsea fans are hoping for successful performances from the teenager in the EFL Cup.