Tottenham Hotspur boss was speaking after a fourth league game without a win.
Tottenham Hotspur boss Mauricio Pochettino says he was pleased with striker Harry Kane and defended the star's performance.
Kane was not on the scoresheet in the 1-1 draw at Watford, with South Korean international Heung-Min Son scoring his side's goal.
Kane has netted twice in his last four league games despite Tottenham failing to win any of these, and Pochettino is not concerned about his star man.
Instead he attributed Kane's blank at Vicarage Road down to the red card received by defender Davinson Sanchez, which made his side's task tougher.
Pochettino told Football London when quizzed about Kane: "I think today he was very active. After 50 minutes, 11 v 11, Harry was very active. I am happy with his performance.
"Harry was good and it’s so difficult to play ten against 11. The effort as a striker when you have to play like that in the second half, you feel a little bit more alone. You need to defend and you need to run."
Pochettino added that he did not feel that Spurs were necessarily less dangerous simply because Kane did not score, but that playing with 10 men really limited what they could do against a very good Watford team.
Kane's tally of 10 Premier League goals this season has been bettered only by Mohamed Salah of Liverpool.
Tottenham will feel like they did well to hang on with 10 men claim a draw having been a goal down to Watford, but they have slipped further behind their top four rivals Liverpool and league leaders Manchester City are already 15 points ahead, with a game in hand.