Arsenal needed penalties to defeat Porto in the Champions League to reach the quarter-finals, but they held their nerve as they secured a hard-fought victory. Porto gave Mikel Arteta’s side a tough test as their stubborn defence would not allow Arsenal in, and after 120 minutes of football the Gunners could not find the crucial second goal at the Emirates. This meant that a rare penalty shootout was needed in North London. This was the first shootout in the Champions League since the 2016 final, and the club’s first in the competition since 2009. David Raya stepped up as the hero, saving two p…