#3 The form of Marcus Rashford

Marcus Rashford's involvement on Sunday will be subject to so much debate and speculation after suffering a knock to his back in midweek's 1-0 win against Wolves in the FA Cup third round.
Ole Gunnar Solskjaer hasn't ruled him out completely which means there is a chance the young Englishman could feature against Liverpool.
Should Rashford play, then United will once again vest the responsibility on another match-winning performance to their talisman. The 22-year-old has scored a personal best 19 goals this season in all competitions and he is the current top scorer for Manchester United. Rashford has been deployed on the left-wing for most of the season, but he confessed he is at the peak of his game when playing just inside - not as a central striker or as an out and out winger.
Rashford, Martial and Daniel James have incredible pace and relentless pressure. Solskjaer orchestrated a 3-4-1-2 system in the 1-1 draw at Old Trafford, with Rashford and James operating as the two central strikers. But given Martial's availability, the Frenchman could lead the attack, with Rashford and James supporting down the flanks.