Chelsea and Real Madrid are battling for a place in the Champions League final over two legs.
The Blues are looking to reach their first final since the London club's historic triumph back in 2012.
However, they face a really difficult test against 13-time champions of Europe, Real Madrid, who saw off Liverpool in the quarter-final.
Los Blancos outclassed the Reds over two legs as Zinedine Zidane looks to create even more history.
The first-leg takes place on Tuesday, April 27, at the Estadio Alfredo Di Stefano - Madrid's training complex - with the infamous Santiago Bernabeu currently undergoing refurbishment.
When is the second-leg of Chelsea vs Real Madrid?
Chelsea take on Real Madrid at Stamford Bridge for the return leg on Wednesday, May 5 - just over a week from the opening clash.
The match in west London is set to kick off at 8pm and will be shown live on BT Sport.
To watch the match, you will require a BT Sport subscription, and you can find all the details here.
When is the 2020/21 Champions League final?
If Chelsea do progress against Real Madrid, then Saturday, May 29 will be a date to write down in Blues supporters' calendars.
The final will be played in Istanbul, Turkey - at the Ataturk Stadium.
The first-leg of the other semi-final: Paris Saint-Germain vs Manchester City, takes place on Wednesday, April 28, with an 8pm kick-off time.
The second-leg of the tie, that takes place at the Etihad Stadium in Manchester, will be played on Tuesday, May 4, also with an 8pm kick-off time.
