In the 2011–12 season, Tiendalli started for Twente as they faced Ajax for the second time in a row for the Johan Cruyff Shield and went on to win 2–1. He played in three matches in Twente’s UEFA Champions League Qualification Round, until the club were eliminated in the play-offs following a 5–3 loss on aggregate against Benfica. From the start of the 2011–12 season, Tiendalli found himself in competing for his first-team place at left back. In the UEFA Europa League match against OB, he set up the club’s second goal of the game, a 3–2 win leading to qualification for the knockout stage of the tournament. Tiendalli suffered an ankle injury during a 4–1 victory over Groningen on 29 January 2012 and was substituted in the 7th minute. He did not return to the first team until 4 March 2012 when he came on as a late substitute in a 6–2 win over PSV Eindhoven. He continued to face competition for the left-back position under new manager Steve McClaren. He finished the 2011–12 season having appeared forty-one times in all competitions. It was announced on 1 April 2012 that Tiendalli would be leaving the club at the end of the season.