LISBON :Bukayo Saka scored one goal and set up another as Arsenal thrashed Portuguese side Sporting 5-1 in their Champions League clash at the Estadio Jose Alvalade on Tuesday, their biggest away win in the competition in 21 years. Gabriel Martinelli put Arsenal ahead early on before Kai Havertz and Brazilian defender Gabriel added two more goals before halftime as Arsenal overwhelmed their hosts. Goncalo Inacio pulled a goal back for Sporting early in the second period, but Saka restored