Ole Gunnar Solskjaer's Manchester United continue to be an enigma.
They haven't scored a Premier League goal from open play at Old Trafford for two months and yet scored four from open play in one match at the same venue against RB Leipzig in the Champions League.
They scored four times away from home against Newcastle and three goals at each of Brighton and Everton, yet somehow find scoring in their own backyard nigh on impossible.
Solskjaer's United relish tearing apart teams on the counter-attack but, for all their fabulous attacking options, seem stumped when confronted with a five-man defence sitting deep.