Complex sentence: Spurs lost against Benfica in the 1961--62 European Cup semi-final, however in the following season White was part of the successful campaign that saw Tottenham become the first English winners of a European trophy when they won the 1963 European Cup Winners' Cup Final.
Split into simpler sentences: Spurs lost against Benfica in the 1961--62 European Cup semi-final. The next season White was part of the successful campaign that saw Tottenham become the first English winners of a European trophy when they won the 1963 European Cup Winners' Cup Final.