Manchester United played out what was, in the end, a rather comfortable 3-0 win over Swiss champions Basel as they continued their unbeaten run at home in Europe - a streak that has now gone up to 19 games (WWWWDWWWDWDWWWWWWDW)Marouane Fellaini broke through to score the opener just past the half-hour mark before a goal apiece from Romelu Lukaku and Marcus Rashford took the game away from the visiting outfit as Old Trafford welcomed back the Champions League by producing the best atmosphere the grand ol' stadium has seen in a while.There were no prawn sandwiches being hand on the night, Keano!With that here are the 5 key talking points from Jose Mourinho's Champions League debut with his new club:#5. United will sweat over Paul Pogba's fitnessUnited will be hoping Paul Pogba returns soonWhen he walked out of the tunnel, armband wound tight around his bicep, chest thrust out in pride, you couldn't help but feel happy for Paul Labille Pobga. He started the game with real intent and purpose - gamboling his way around the pitch in that lazy, athletic, uncannily fast manner of his, pinging passes hither and thither with eerie calmness and generally being the dominant presence in the middle of the park.Then in the 17th minute, he stretched his left hamstring and that was that.Manchester United have a lot of fine, fine, players but none are as important to the system as the enigmatic Frenchman. With a tough visit from old boy Wayne Rooney and his Everton compadres on the cards this Sunday, Mourinho, and United will be hoping it's just a minor strain.