Since football restarted in June, Chelsea and Manchester United have been battling for a top-four finish in the Premier League.
Now, they're scrapping over a place in the FA Cup Final, in the second of the weekend's semi-final.
Ole Gunnar Solskjaer has had the measure of Frank Lampard so far this season, winning all three of their encounters so far.
The Reds beat Chelsea 4-0 on the opening day of the season, before securing a 2-0 win at Stamford Bridge in February. Sandwiched in between that was a 2-1 EFL Cup win in west London.
What time is Man Utd vs Chelsea?
Sunday's semi-final at Wembley gets underway at 6pm.
The winner will play Arsenal, who beat Man City 2-0 in the first semi-final on Saturday.
Two hours before the Wembley showdown, top four rivals Leicester go to Tottenham Hotspur in a match which looks set to have a big role to play in who qualifies for next season's Champions League out of Man Utd, Chelsea and the Foxes.
Man Utd vs Chelsea TV channel and live stream
The rights to show the FA Cup are split between the BBC and BT Sport.
Sunday's semi-final between Man Utd and Chelsea will be shown on the BBC, meaning it will be free-to-air.
Coverage starts on BBC One at 5.30pm, while fans can also stream the game through the iPlayer.
Odds
Man United - 7/5
Draw - 12/5
Chelsea - 2/1
Ole Gunnar Solskjaer and Frank Lampard love a good FA Cup tie.
They have been involved in a number of cup runs and combined they have won six FA Cup finals in their careers - the same number as favourites Manchester City.
Both clubs will know Champions League qualification is the priority, but being so close to lifting a trophy is too good an opportunity to turn their backs on.
United have a 100% record against the Lampard's side and if that continues, we could have the first ever Manchester Derby FA Cup Final.
Odds courtesy of thepools.com.
