At the start of the Premier League season, if you were to talk about a London derby that could be crucial for both teams in the race for Champions League qualification, you might guess it would be Chelsea against either Arsenal or Tottenham.
That West Ham are still in the conversation for the top four as we approach late March is impressive in itself, but that they have done so while having the added distraction of a Europa League run just adds further credit to the bank for David Moyes' men.
There are no such distractions for Spurs, who host the Hammers on Sunday, with both eager to win and get closer to fourth in the table.
Antonio Conte's men go into the game behind West Ham on goal difference, having played a game fewer, while both sit two points behind Manchester United in fifth and three behind Arsenal in fourth.
Ahead of what should be a fascinating encounter in the capital, Stats Perform has taken a look at some key facts.
Kane to continue bashing Hammers?
Harry Kane has had an odd season, scoring just once in his first 15 games in the league, before plundering 11 in 14 top-flight appearances since.
The England captain also has a tremendous record against West Ham, scoring eight in his six home league games against them – the most home goals he has scored against a specific opponent in the competition.
However, Hammers striker Michail Antonio has scored more Premier League goals against Tottenham than he has against any other opponent in the competition (six), three of which have been the winning goal in 1-0 victories, including in the reverse fixture this season.
Spurs must avoid more derby misery
Tottenham have lost five of their seven Premier League London derby matches this season (W2), last losing more in a single campaign back in 2004-05 (seven).
In fact, their six points accumulated is the fewest of any other side in Premier League London derbies in the current campaign.
West Ham, on the other hand, have won three of their last four derbies in the league (L1), as many as they had in their previous 12 such games (D5 L4).
Only Chelsea (18) have earned more points in London derbies this season.
Moyes must rediscover form on the road
It has been a memorable season for West Ham so far, including a famous European night at the London Stadium on Thursday as they knocked Sevilla out of the Europa League to reach the quarter-finals.
However, despite a very good start to the campaign, they have come unstuck in away games in the Premier League.
Having won four and drawn one of their first five away games in the league this season (13 points), the Hammers have since won just twice in nine on the road, drawing two and losing five (eight points).
Go on, my Son
With all the deserved plaudits Kane gets, it can sometimes feel like Son Heung-min gets a bit ignored despite being one of the best players in European football.
Son has been in fine form as Spurs have tried to force their way back into the top four, and has been involved in seven goals in his last seven Premier League home games (six goals, one assist).
Overall this season, he has scored twice as many home league goals as any other Spurs player (eight).