London, April 16 -- Arsenal booked their place in the UEFA Champions League semi-finals for a second straight season, but not without a few anxious moments, as they played out a nervy 0-0 draw against Sporting CP at the Emirates Stadium in London to progress 1-0 on aggregate.

Coming into the second leg under pressure after a dip in domestic form, Arsenal began brightly but struggled to sustain their early tempo. Sporting gradually grew into the contest and looked the more composed side for long spells of the first half.

Francisco Trincao had the first real opening, dragging his effort wide, before Pedro Goncalves also failed to hit the target from a tight angle.

The visitors came closest before the break when Geny Catamo struck the out...