New coach Francesco Calzona made his debut for Napoli with a 1-1 draw against Barcelona in the first leg of their Champions League last 16 clash on Wednesday, while Porto claimed a 1-0 stoppage-time win over Arsenal Barcelona forced Napoli goalkeeper Alex Meret into several saves in the first half, but only found their breakthrough in the 60th minute, when Robert Lewandowski squeezed a low effort into the net. Napoli, however, kept the match-up wide open as Victor Osimhen put the Italians back in contention for a quarter-finals spot with a 75th-minute equalizer. Ilkay Gündogan could have score…