Inter Milan hero Beppe Bergomi insists fatigue is a factor for the team's current slump.
Inter have surrended the Serie A leadership in recent games and were stunned by Sassuolo on Sunday.
Bergomi reasoned: "To explain the Inter crisis we must go back to January 9. From January 9 to February 20, Inter played 10 games In 40 days, eight of which with the strongest teams. I see a team that is tired, they are matches in which they have not been able to make deep rotations because they were all important matches.
"In addition, Sassuolo are the worst team to face after the Champions League, they are strong and fast and they put you in difficulty. In my opinion they have spent a lot of physical and nervous energy and now they are paying a little, I really see a tired team."