Liverpool's Sadio Mane (L) is tackled by Sheffield United's Ethan Ampadu during the Premier League football match between Sheffield United FC and Liverpool FC in Sheffield, Britain, on Feb. 28, 2021. (Xinhua)

Liverpool's Ozan Kabak (R) vies with Sheffield United's Billy Sharp during the Premier League football match between Sheffield United FC and Liverpool FC in Sheffield, Britain, on Feb. 28, 2021. (Xinhua)

Liverpool's Nathaniel Phillips (R) competes during the Premier League football match between Sheffield United FC and Liverpool FC in Sheffield, Britain, on Feb. 28, 2021. (Xinhua)

Liverpool's Trent Alexander-Arnold crosses the ball during the Premier League football match between Sheffield United FC and Liverpool FC in Sheffield, Britain, on Feb. 28, 2021. (Xinhua)