Davy Klaassen (born 21 February 1993) is a Dutch professional footballer who plays for Bundesliga club Werder Bremen and the Netherlands national team. He is usually deployed as an attacking midfielder for both club and country.
Klaassen began his football career in the youth ranks of local amateur side HVV de Zebra's, where he played until 2003, when he transferred to HSV Wasmeer. A year later he was recruited into the famed Ajax Youth Academy. While playing for the Ajax A1 youth squad in 2011–12, Klaassen helped his side to win the Nike Eredivisie league title, as well as finishing as runners-up to Inter Milan in the NextGen Series (the Champions League equivalent for under-19 teams) after losing on penalties (5–3) following a 1–1 deadlock after extra time.
Klaassen made his debut for the first team in the UEFA Champions League group stage away draw (0–0) against Olympique Lyonnais on 22 November 2011 replacing Lorenzo Ebecilio in the 85th minute. While still competing in the A-Juniors Nike Eredivisie league competing for the Ajax A1 under-19 squad, he made his Eredivisie debut on 27 November as a substitute against NEC and scored only 42 seconds after having been subbed on. He made his debut in the starting XI of the Ajax first team on 11 December 2011, due to starting center midfielder Theo Janssen catching the flu. Klaassen played the entire match which ended in a 0–1 away win for Ajax against RKC Waalwijk.