Birthday boy Andreas Christensen fired the winner shortly after coming on, and Raphinha hit a brace as Barcelona claimed a thrilling 3-2 comeback victory at Paris Saint-Germain on Wednesday in the Champions League quarter-finals. Raphinha opened the scoring in the 37th minute against a shaky PSG defence, and made it 2-2 in the 62nd with a delicate effort, before Christensen headed the 3-2 winner in 77th with his first touch on the day he turned 28. PSG had fought back after the restart as Ousmane Dembele netted a 48th-minute equalizer against his former club, and Vitinha put the hosts 2-1 up i…