Two of the league's form teams meet at London Stadium on Saturday (17:30 GMT), albeit with West Ham United and Bournemouth experiencing rather different campaigns.
The Hammers, in 17th place, have won three of their last five in the league, drawing with Manchester United last time out. The 10 points they've earned in that timeframe is as many as they acquired in their previous 15 matches.
Hammers can flee the bottom three
Significantly, this round of fixtures presents them with the chance to move out of the drop zone for the first time since early December, should they win and Nottingham Forest lose to Liverpool (depending on goal difference).
Crysencio Summerville continued his sparkling form with an extra-time winner in a tense FA Cup fourth round win over Burton Albion, taking him to six goals in his last seven games.
Nuno Espirito Santo made 10 changes for that clash against League One opposition but had to call upon Summerville from the bench to put the tie to bed, perhaps indicative of his side's reliance on a small pool of goalscorers.
Even in the Premier League the Irons have been using the full extent of their squad in a bid to find a winning formula. Following a busy winter transfer window, they've used more different players than any other side in the league this season, with 32, yet only Everton have had fewer different goalscorers than West Ham's nine.
Cherries blossoming
Bournemouth are unbeaten in their last six league games, with four wins and two draws moving them from 15th to ninth since the turn of the year.
The Cherries' first-ever Premier League win came against West Ham at Upton Park in August 2015. In recent years though, they're winless in their last 10 meetings with the Hammers in all competitions – the last five in the league have all been draws.
Andoni Iraola's side came from behind to beat Everton 2-1 last week, with Brazilian forward Rayan on the scoresheet for the second successive game. Add to that an assist on his debut and the 19-year-old is aiming to become the first teenager in the history of the competition to record goal involvements in each of his first four games.
That superb second half turnaround at the Hill Dickinson Stadium was typical of the Cherries' resilient attitude this season. Only Aston Villa and Sunderland have rescued more points from losing positions in the top-flight this season than Bournemouth's 14.
In Rayan and Junior Kroupi – the top scorer left at the club after Antoine Semenyo's move to Manchester City – Bournemouth boast an exciting young forward line, but it's one of their former heroes they'll need to watch out for on Saturday, even if he is no longer first choice in east London.
Callum Wilson, who hit 67 goals in his six seasons in Dorset, netted twice in a 2-2 draw at the Vitality Stadium in November. He has a particular fondness for this fixture, scoring in it nine times (seven for Bournemouth, two for West Ham).