During what season of Europe's secondary club football tournament was the  2017 UEFA Europa League Final, where Manchester United finished in sixth place?
2016–17 Manchester United F.C. season The 2016–17 season was Manchester United's 25th season in the Premier League, and their 42nd consecutive season in the top-flight of English football. It began against Leicester City in the FA Community Shield, with United prevailing 2–1 to win the first trophy of the domestic calendar. In February 2017, the club won their second trophy of the campaign, beating Southampton 3–2 in the EFL Cup Final. Although they missed out on qualifying for the 2017–18 UEFA Champions League via the league, having finished in sixth place, a 2–0 victory over Ajax in the 2017 UEFA Europa League Final meant they qualified for the Champions League group stage as Europa League title holders.
2017–18 Tottenham Hotspur F.C. season The 2017–18 season is Tottenham Hotspur's 26th season in the Premier League and 40th successive season in the top division of the English football league system. Along with the Premier League, the club will compete in the Champions League, FA Cup, EFL Cup. Following the demolition of White Hart Lane, Spurs will play all home fixtures at Wembley Stadium during this season at full 90,000 capacity. The season also marks a change in kit suppliers as Nike replaces Under Armour.