Sir Alex Ferguson has told his Manchester United players they cannot make the "stupid errors" of last season in the UEFA Champions League.
United will be expected to qualify for the knockout stages of the competition after being drawn alongside Braga, Galatasaray and CFR Cluj in Group H.
But that was the case when the Red Devils were pitted against Benfica, Basel and Otelul Galati last season but Ferguson's men still managed to falter.
Ferguson is determined not to make the same mistake again and is particularly wary of the thought of returning to Galatasaray after some famous battles down the years.
"We have the experience of playing against Galatasaray in the past and we will always remember the 'Welcome to Hell' banners," Ferguson told Manchester United's official website.
"So it's always a difficult type of match.
"We have drawn Portuguese clubs a number of times over the past few years - the likes of Benfica, Sporting Lisbon and Porto - so we have the experience of playing in Portugal on many occasions.
"Braga are one of the improving teams in that country.
"Obviously, we've never played Cluj before but, after the experience of last year, we don't want to make any stupid errors this time. We will play our strongest team to make sure we get through."