Here are three interesting stats:
1. Away day Blues
Amazingly, no Chelsea striker has scored an away goal in 2013.
2. Two in nine
The Swans have striker problems of their own, however, with their undoubted star of last season, Michu, ruled out for three months with inury.
Swansea manager Michael Laudrup's woes extend furthermore when you look at Swansea's recent results. In their last nine league games, they have won just twice.
Away from home, meanwhile, Fulham are the only side Swansea have beaten since September, so the omens bode well for Mourinho and his Blues.
3. Contrasting fortunes
Our final stat provides some significant revelations about the competitiveness of the Premier League this term.
Indeed, while Chelsea had accumulated two less points by this point last season than they have so far this campaign, the Blues find themselves a place higher in the table, in third.
Swansea, however, have less points than they did this time last year - and are also three places lower in the league table.
Can Chelsea capitalise on the Swans' inconsistent form this term ? Or will Laudrup's side spring another surprise on Boxing Day ?
image: © wshjackson