Chelsea train for Champions League clash against Porto and a season-defining week - in pictures

Thomas Tuchel's team have a 2-0 advantage going into quarter-final second leg on Tuesday

Chelsea's players during a training session at the Ramon Sanchez Pizjuan stadium in Seville on the eve of their Champions League quarter-final second leg against Porto. AFP

Chelsea manager Thomas Tuchel speaks to Olivier Giroud during a training session at the Ramon Sanchez Pizjuan stadium in Seville. AFP

Chelsea's manager Thomas Tuchel attends a training session on the eve of their Champions League quarter-final second leg against Porto. AFP

Chelsea during a training session in Seville, Spain, on Monday. Getty

Timo Werner of Chelsea during a training session at Ramon Sanchez Pizjuan stadium. Getty

Chelsea's players during a training session at the Ramon Sanchez Pizjuan stadium. AFP

Chelsea's defender Marcos Alonso works out during a training session. AFP

Chelsea's players train ahead of their match against Porto. AFP

Chelsea' take a 2-0 advantage into their Champions League quarter-final second leg against Porto. AFP

Chelsea's players during a training session in Seville on Monday. AFP

Chelsea trained on Monday for what is set to be a crucial few days for Thomas Tuchel's side.

The Blues face a season-defining week given Saturday's FA Cup semi-final against Manchester City follows quickly on from Tuesday's Champions League quarter-final clash against Porto.

Tuchel said his players must not "lose their heads" by allowing their 2-0 first-leg advantage over Porto to lull them into a false sense of security.

Chelsea have one foot in the last four of Europe's elite club competition courtesy of superb individual goals from Mason Mount and Ben Chilwell, but Tuchel insisted he will not set his side out to protect their lead in the 'home' leg in Seville.

"We don't approach games like this, to talk about the result we have and then change our approach," Tuchel said. "It's important to be fully focused and play the best game possible.

"It's easier for Porto to adapt because they know what they need to do to go through. For us if we start adapting we could easily lose our heads.

"What does it mean? Is it enough to lose one-zero? Why should we enter this frame of mind? We have a certain way of playing and we will try to bring that. We have to be free in our minds to react to situations on the pitch."

Tuchel will make a late call on whether N'Golo Kante can start.

Kante has only just shaken off his latest hamstring problem and Chelsea also take on City in the FA Cup on Saturday.

Tuchel remains unsure at this point whether Kante can manage two matches in the week and so the France World Cup winner could take a seat on the bench in Seville.

Tuchel believes his side are on course for a strong finish to the season.

"There's nothing less interesting than the past," he said. "Everything that counts is the next match and competition.

"Tomorrow there's no trophy to win, on Saturday there's no trophy to win, but these are matches where we can take decisive steps."