LONDON (Reuters) -One of the few clouds hanging over Arsenal this season has been the lack of goals from the big-money centre forward Viktor Gyokeres but he erased some doubts with a timely return to form by scoring twice in a 4-0 defeat of Atletico Madrid on Tuesday.

Gyokeres, who Arsenal signed for 64 million pounds ($85.89 million) from Sporting, poached his side's third and fourth goals to end a nine-game streak without netting for club and country.