Genoa coach Gian Piero Gasperini believes Jose Mourinho's touchline ban is hurting Inter Milan.
This was the second consecutive 0-0 home draw for Inter after Sampdoria also held the leaders a fortnight ago.
Mourinho continues to sit out a three-match touchline ban and was spotted in the stands going through the same motions, shouting and gesticulating at his squad.
And Gasperini said: "I believe Mourinho's absence was decisive."