Whilst Chelsea rule the roost at the top of the table for the first time this season , West Brom find themselves in a rather more worrying position - they currently lie in 18th, just inside the relegation zone.
In November, Eden Hazard's controversial stoppage-time penalty salvaged a draw for Chelsea against West Brom and kept Jose Mourinho's unbeaten home record intact. The Baggies will surely be looking for vengeance when Chelsea return to the Hawthorns tonight.
On paper, this match appears to be a routine victory for Chelsea but in fact it is anything but. Chelsea have managed to lose on their last two visits to The Hawthorns and with West Brom desperately needing to get points from every single game until the end the season, it promises to be an exciting match.
Indeed, a lot has changed since the match in November when Chelsea were in fourth and only five places in front of West Brom. But one thing that hasn't changed is the desire from both teams to claim victory over the other.
However, for Chelsea, there is a much greater issue at hand. Now comes the chance to turn the screw and test the real pedigree of their challengers by stretching their lead at the top.
Leading from the front won't phase Mourinho. In his previous title successes at the Bridge, Chelsea hit the top well before now and stayed there. This time there are just 13 fences left to jump, although the field is stronger than in 2005 and 2006 - a fourth Premier League crown is now theirs to lose.
New Baggies manager Pepe Mel is still looking for his first victory with West Brom and if they manage to pull of a much needed win tonight and continue on a good run of form, their relegation prospects might decrease dramatically.
Either way, this is a pivotal game for both teams and one that they will surely both be looking to pick up the full three points from.
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