It may only be a friendly, but sadly for Andrei Coubis his first AC Milan start was broadcast on British television.The 21-year-old centre-back finally graduated to the first team for pre-season, but may well have damaged his chances of sticking around with an 18-minute horror show against Chelsea.Coubis put the ball in his own net to start the gameGettyAnd then took down Pedro for a red cardAFPThe red card was in no doubt at allGettyThe Blues were playing their second of two pre-season friendlies at Stamford Bridge live on Channel 5, when Coubis gifted them the simplest of openers.In the fifth minute of the game captain Reece James fired a free kick from out wide on the left into the six yard box.France goalkeeper Mike Maignan was nowhere near it and, with Enzo Fernandez running in at the back post, Coubis stuck out a hesitant right boot to direct it into the back of his own net.The Milan-born Romanian youth international looked down at his feet trying to work out what had happened, and was crestfallen as he stomped away.However, his misery was far from over.Just 13 minutes later a Chelsea ball over the top found Joao Pedro for a one on one with Coubis, and the youngster had no chance, wrestling the former Brighton man to the ground for a simple red card – even in a friendly.Chelsea were already two up at that point – through Pedro – and Liam Delap later made it 3-0 in the second half, before Milan pulled one back through Youssouf Fofana and Delap made it 4-1 at full-time.The match continued a stunning run of form under Enzo Maresca, extending back into last season.It’s now seven wins on the bounce including pre-season, with the previous five coming in the Blues’ Club World Cup victory in the US.In fact – to end the 2023/24 season Chelsea won 14 out of 16, including the Conference League final and an impressively dominant 3-1 victory over Premier League champions Liverpool.Coubis’ 18 minutes were certainly eventfulView Tweet: https://t.co/DMjBenlfrLChelsea continued their form with another decent winAFPFor Milan, the timing of Coubis’ performance isn’t exactly ideal.The seven-time Champions League winners are on the brink of selling lead centre back Malick Thiaw to Newcastle for £35million, helping cover the financial loss of a surprise season without European football.Six-time Serie A winner Massimiliano Allegri has returned to San Siro after his title triumph with Milan in 2011, hoping to restore some pride after an eighth-place finish last season that was followed by a Coppa del Rey final defeat to Bologna.To help him do that is Luka Modric who has already joined on a free transfer from Real Madrid where he became one of the game’s greatest-ever players with six Champions League wins.Who else could AC Milan sign?There could well be another arrival too – Rasmus Hojlund.talkSPORT understands that the Danish striker has reluctantly agreed to leave Manchester United just two years on from joining for £72m.Hojlund could be another reinforcement at MilanGettyUnited have signed striker Benjamin Sesko for £73m from Leipzig, with Hojlund well aware his opportunities will be limited this season.The 22-year-old is rated at £40m, and would be returning to a league where he first made his name with Atalanta.Chelsea team newsElsewhere, there was some bad news for Chelsea as Trevoh Chalobah was taken off in discomfort.The injury shortly after the Blues lost Levi Colwill to an ACL injury.The Blues will also be without striker Nicolas Jackson who is serving the final game of his suspension after being sent off against Newcastle last term.