Chelsea are reportedly interested in signing Inter Milan goalkeeper Andre Onana, amid concerns surrounding Edouard Mendy's long-term future at the club.It is believed that the Blues will let the Senegalese shot-stopper leave the club this summer should they get a concrete offer for his signature.Chelsea FC FR@ChelseaFCFRA#Chelsea réfléchit à l'idée d'inclure Edouard Mendy dans une éventuelle offre d'échange contre le gardien de l'Inter Milan André Onana.(InterLive via Express) #CFC14411#Chelsea réfléchit à l'idée d'inclure Edouard Mendy dans une éventuelle offre d'échange contre le gardien de l'Inter Milan André Onana.(InterLive via Express) #CFC https://t.co/Rlam9JWqVYMendy hasn't been at his best for Chelsea this season after battling injuries and loss of form. The Senegalese international has also lost his number one spot to Spanish shot-stopper Kepa Arrizabalaga.Meanwhile, the Blues have now identified another African goalkeeper in Onana as a possible replacement for under-performing Mendy.Gianmarco✍🏼@GianmarcoDaria Nelle ultime ore il Chelsea ha preso informazioni dettagliate su André Onana per avere fin da subito le idee chiare in caso di sostituzione di Edouard Mendy. [@TuttoMercatoWeb]1031🇨🇲 Nelle ultime ore il Chelsea ha preso informazioni dettagliate su André Onana per avere fin da subito le idee chiare in caso di sostituzione di Edouard Mendy. [@TuttoMercatoWeb] https://t.co/pS4AGCfVCbThe former Cameroonian international has been in fine form for Italian club side Inter Milan since signing on a free transfer last summer.Onana, who is now Inter's number one shot-stopper, has kept a combined total of 14 cleansheets in 27 appearances for the Nerrazuri.His fine form in-between the sticks has contributed to Inter Milan's success so far this season. Onana's team have already won the Supercopa Italia trophy this season, beating rivals AC Milan 3:0.FCIM PICTURES 📸🎨@FCIM_PicturesANDRE ONANA APPRECIATION TWEET 🦁🧤@AndreyOnana 🖤93484ANDRE ONANA APPRECIATION TWEET 🦁🧤@AndreyOnana 🖤💙 https://t.co/2UezcWYNP8They are also second in the Serie A table with 59 points and have booked their place for the quarter-finals of the UEFA Champions League.Meanwhile, Chelsea aren't expected to have a free run at signing Onana, who is currently valued at £25 million by Inter Milan.The Blues are expected to face strong competition from London rivals Tottenham, who also hold a strong interest in the Cameroonian shot-stopper.It's left to be seen as to whether the Blues will succeed in their quest to land the services of Onana this summer amid interest from Spurs.Graham Potter gives hint at a possible change of role for Kai Havertz at ChelseaThere seems to have been a lot of talk as to what exactly is the best role for Chelsea forward Kai Havertz since he joined the West London club in 2020.The German has been used in a couple of positions, including number 10, winger and predominantly as a false nine.However, Chelsea manager Graham Potter seems to be deploying Havertz in a new role, especially in the last two games he has played for the Blues, notably against Borussia Dortmund and Leicester City.Speaking about Havertz's best role as a player, Potter said,"That’s the thing, Kai is still young and can play in a lot of positions. He's probably not quite leading the line now, he's behind the line, and that's probably his best position, although I would not rule anything out with Kai because the mentality is there and he has got all the attributes to do anything.He continued:“I think he is a confident player, but he is also someone who you need to help. I can’t speak highly enough of him, to be honest. He has given everything all the time, does his absolute best, takes responsibility, and is an absolute dream to work with as a coach."The Blues host Everton at Stamford Bridge in the Premier League later today and will look to make it four wins on the bounce.