Jürgen Klopp is slowly exerting his influence and philosophies on this Liverpool side, but his defence remains a cause concern.
The former Kop hero is unsure that Sakho's displays merit a starting spot, highlighting his performance against Spurs on Saturday:
"I'm not really sure what Sakho was doing in the first half against Spurs and he was extremely lucky to go unpunished, which you can't expect to be the case against this Dortmund side."
Thompson went on to suggest, however, that leaving the former PSG man out could, in fact, be counter-productive:
"He obviously had a very difficult game and Dejan Lovren did very well to bail him out, but if you leave him out that will wreck his confidence."
When Marin Skrtel came on at half-time at Southampton, Liverpool held a comfortable 2-0 lead. The Slovakian defender went on to produce an error prone display that enabled the Saints to win the game 3-2.
It seems more of a selection dilemma in the sense of who is the best out of a bad bunch for Klopp.
Thompson highlighted Liverpool's need to score in Germany, whilst calling for calm if they go a goal down:
"I do think that Liverpool have to score to have a chance of qualifying because you'd expect them to find the net, but they need to be clever and not go chasing the game at 1-0 like Tottenham did."
Klopp's Liverpool head to Germany on the back of an inconsistent run in the Premier League that has seen them take seven points from the last four games.