Manchester United striker Wayne Rooney has said it's 'difficult' to see Liverpool doing so well this season, according to Sky Sports.
Liverpool are serious title challengers this season whilst United have endured a frustrating campaign and are sitting in sixth position in the Premier League.
"To see City doing well, and particularly Liverpool, is really difficult," the England striker told club magazine Inside United.
"It's not nice when we know we are capable of being up there challenging and we haven't been doing that this season.
"However, it means we have to step up and get back up there because the feeling we've had this season is not a nice feeling at all to have."
United host Liverpool at Old Trafford on Sunday which is an incredibly important game for both sides, and neither of them can afford to lose.
"We have to keep working, keep progressing and finish the season stronger.
"As a group of players and a team we haven't been good enough this season and we have to put that right.
"After Sir Alex being here for 26 years, there was always going to be a change whoever came in and, in fairness, I think the players have to do better."
The two sides head into the fixture with reverse ambitions from last season; Liverpool aiming to win the league title and Manchester United with an unrealistic ambition to get fourth place and qualify for Champions League football.
But the United man has stated they can still make fourth place despite their troubling position.
"Hopefully we can make the top four but, if not, we will still come back firing for next season."
David Moyes is expected to be handed a large transfer fund to improve the squad in the summer, which will be a huge relief for United fans who want to see their club back on its feet sooner rather than later.
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