Yet, even with Kane currently out injured, Janssen is still to find his feet in north London and a penalty in the EFL Cup defeat to Liverpool on Tuesday night was only his second Tottenham goal, with the other also coming from 12 yards earlier in the competition.
Janssen had been desperate to add to his tally at Anfield as soon as the second-half spot-kick was awarded, though he denied doubt had started to creep in as a result of his slow start in England.
"As a striker you always want to score and when I saw the referee gave a penalty I took the ball and put it in," he told Spurs TV.
"For me it doesn't matter where I take the penalty. It's just a penalty and you have to score it, I have enough confidence, it doesn't matter to me where it was or how long I haven't scored for. It was just a penalty, I wanted to score it and that's what I did."