Man U is playing without Gigs, lost to the Arsenal last week , and tied against Reading (crappy team, newbie on the premier league), last week barely won against Celtic at home.
Benfica is stronger by far than Celtic. Even tho Benfica is not playing that well in their league, they play hard at home and more importantly at the Champions, In front they've got Nuno Gomez and Simao who is on fire.
2 units Benfica +1.5-140