Celta Vigo have never won the league title nor Copa del Rey, although they have reached the final three times in the latter. One of the teams best seasons was 1970–71, when they finished unbeaten at home and were known as the giant-killers. Celta came sixth that season and qualified for the UEFA Cup for the first time. The club finished in their best-ever position of fourth in 2002–03, qualifying for the 2003–04 UEFA Champions League, where they were eliminated by Arsenal in the Round of 16. In the 2016–17 UEFA Europa League, Celta reached the semi-finals of the UEFA Europa League for the first time, losing to Manchester United.