After putting in their best start to a league campaign in Premier League history, winning four from four before the global break, Jurgen Klopp's side have done as much as possible toward that aim already this term.
The Brazilian had been in solid form for the Reds before his error against Leicester City last time out, but Thompson feels that the goalkeeper will be able to learn from the mistake.
"Maybe that wouldn't have been the same a year ago but hopefully he will have learnt".
Kane will be keen to get back among the goals with lingering questions over his early-season form and fitness in a World Cup hangover since picking up the Golden Boot in Russian Federation.
Spurs' captain was absent for the 2-1 defeat to Watford before the global break due to a thigh injury, which also meant he missed France's fixtures against Germany and Netherlands.
But victory will take them level with Liverpool at the top of the table for at least a few hours before other front-runners Chelsea, Watford and Manchester City are in action later on Saturday. The Watford crowd will be well up for it after the run they have been on, but United will have a plan and if they can be calm and control the game, it should be enough for three points.
Speaking in an interview with BetVictor, Owen said: "This is a real test of Liverpool's title credentials and a win at Wembley will go a long way to proving their doubters wrong".
However, Keita was left on the bench for Liverpool's trip to Leicester City in their most recent match, and he says it will take more time to acclimatise following his arrival from RB Leipzig.
If Manchester United can do that on Saturday, I can see them winning the game.
Liverpool are now top of the table after four games with a 100% record.