Liverpool have enjoyed a successful start to the season following a disappointing campaign last year. In their opening five games, the Merseyside club have won four and drawn one with those four victories coming in a row.
It's been a similarly impressive start for the Europa Conference champions as West Ham have managed three wins, one draw and one loss in their opening five fixtures. They sit sixth in the Premier League table, three spots below Liverpool.
Both clubs have begun their European campaigns and both won their opening group games with Liverpool coming back from a goal down to defeat Austrian side LASK. In contrast, the East London club dispatched Serbian side TSC 3-1 despite going a goal down in the second half.
As the pair return to domestic duties, a game against Liverpool is always a tough test for West Ham as they've defeated the Redmen just once in the last six years. Their last win came in a thrilling 3-2 victory at London Stadium while they've since three straight games albeit all by just one goal, proving to be a tough task for Liverpool despite the defeats.
A big potential loss for West Ham in the game on Sunday at 14:00 (UK time) is the absence of Jarrod Bowen who's been dealing with an illness and was forced to miss the club's Europa League game midweek.
It's not yet known whether Bowen will return in time to take on Liverpool but his absence will be felt considering the goals and confidence he brings to this West Ham side.
He leads them in goals with three this season and has impressed over the last two seasons so much that his name has come up in a selection of players that Liverpool may reportedly target should Mohamed Salah leave the club.
While Bowen is not at the level the Egyptian King is performing at, many fans can certainly understand why Liverpool may be keeping tabs on the England international as he continues to progress.
With Liverpool possessing the best overall squad since Jürgen Klopp arrived at the club, he's spoilt for choice in who to start in the game with Darwin Núñez and Luis Díaz pushing to keep their places in the starting line-up due to their impressive mid-week performances.
LFC Globe Verdict
This will be yet another tough test for Liverpool who must focus if they don't want to concede first yet again but I believe with the power of the Kop behind them, they'll score a fifth win in a row with a score-line of 2-0 to the Reds.