Chelsea have arguably had their best week so far this season, courtesy of wins against Real Madrid in the Champions League semi-finals and Manchester City in the Premier League.Up next for them is a home fixture against bitter rivals Arsenal on May 12. Thomas Tuchel addressed the media earlier today to give an update on the team news and his plans for the final few matches of the season.We look at the top Chelsea news ahead of their much-awaited London derby at Stamford Bridge on Wednesday. Chelsea interested in Fiorentina defender Nikola MilenkovicChelsea are interested in beefing up their defensive ranksAccording to Corriere dello Sport, Chelsea are interested in signing Fiorentina centre-back Nikola Milenkovic at the end of the season.The 23-year-old is set to be one of the hottest properties emerging from Italy in the transfer market, with both the Manchester clubs and Liverpool having expressed interest in the player. He has mustered 35 appearances across all competitions for Fiorentina, displaying goalscoring instincts and solid defensive capabilities. Chelsea are interested in Milenkovic as they may lose Fikayo Tomori in the summer as the defender wishes to extend his stay at AC Milan.AC Milan are intentioned to sign Fikayo Tomori from Chelsea on a permanent deal triggering the buy clause [around €28.5m] in case of UCL spot guaranteed. Fikayo would be ‘happy’ to stay. 🔴⚫️ #ACMilanChelsea are still working to extend Thiago Silva’s contract soon. 🔵 #CFC— Fabrizio Romano (@FabrizioRomano) May 10, 2021Tuchel provides injury update on Chelsea players Andreas Christensen is the latest addition to the Chelsea treatment roomThomas Tuchel has ruled injured duo Mateo Kovacic and Andreas Christensen out of the game against Arsenal. The former has been sidelined for the past few weeks due to a hamstring injury and is still some time away from returning to training with the first team. Speaking about Kovacic's injury, the Chelsea boss said:"He is not ready for tomorrow, we have to postpone it to Wembley. His personal race is on to make it to the squad for Wembley."Christensen, meanwhile, limped off after pulling his muscle against Manchester City. "It was much better than we feared. We hope that he can come back in one of the two Leicester games. It will also be a tough one, but the season’s not finished for him, hopefully. We have realistic hopes that he can make his comeback, at the latest, against Aston Villa," revealed Tuchel. Tuchel hails Frank Lampard for Chelsea foundationsFrank Lampard was sacked by Chelsea in late JanuaryTuchel heaped praise on the early seeds sown by Frank Lampard before the club legend was dismissed earlier this season. Under the former Chelsea midfielder, the Blues topped their UCL group and progressed through the initial stages of the FA Cup."You can only arrive in a Champions League final if you make it through the group stage and Frank had an amazing record in the group stage. This lays the foundations for getting to the final and I will never forget this," noted Tuchel. Further praising the Chelsea legend, he continued:"From the first day when I came in here, I was aware that Frank created his own legacy at Chelsea and it is well deserved. When I came in it was halfway through the season and it was about continuing the job he had done."Tuchel admits that Chelsea have a lot to thank Lampard for:"Yes, for sure. You can only arrive in the final of the FA Cup and UCL if you win the group stage. He won those games, it is like this and we don't feel shame to say it out loud. It felt like this from the first day" #CFC— Nizaar Kinsella (@NizaarKinsella) May 11, 2021Also read: Chelsea vs Arsenal prediction, preview, team news and more | Premier League 2020-21