The Dutch champions paid a club-record fee of €31m to sign Bergwijn from the north London club in the summer transfer window.
Ajax wanted him in January, but Antonio Conte decided against selling the Dutchman despite his limited involvement in the first team last season.
Bergwijn admitted that the second half of last season was especially challenging mentally as he was not getting games and minutes despite impressing when he came on as a substitute.
He stressed that he worked hard and pushed himself to get more opportunities but they never came under Conte at Tottenham.
The winger told Dutch magazine Voetbal International: “Especially mentally [it was difficult], because I didn’t play much in the second half of the season at Tottenham.
“If I came on as a substitute, I could have been important but then I had to set on the bench again in the next match.
“The matches and minutes I got, I think forced myself to get a chance but it never came and made it difficult.”
Bergwijn joined Spurs from PSV Eindhoven in January 2020 and scored eight times in 83 appearances for the club.
