If Alexander Isak is to one day make a success of his move to Liverpool, then it will need to be achieved in the absence of luck. Whatever else folk think of him, the poor fella has none, evidenced by one swing of his left leg that helped win a game and quite possibly wrecked his own season, too.
A full diagnosis of an injury to his knee will come in time, but lengthy treatment and the sight of him being helped from the pitch here stirred fears of a potentially serious issue.
If that is the case, it will be desperately unfortunate, not least for the fact that it was sustained in the act of scoring for 1-0 just 11 minutes after entering the game as a half-time substitute.