Sir Alex Ferguson has told his Manchester United players they cannot afford to make the ''stupid errors'' they committed in Europe last season after the Reds were handed another relatively easy-looking Champions League group.
United are expected to qualify for the knockout stages of the competition after being drawn alongside Braga, Galatasaray and CFR Cluj in Group H.
However the United boss is conscious that his side were predicted to make round two last year after being given a favourable draw against Benfica, Basel and Otelul Galati, and for that reason, he insists his squad cannot afford any slip-ups this time around.
Ferguson, who has bolstered his squad since last season by signing Robin van Persie, is also aware that his team will find it extremely hard to come through the test of playing in a very hostile environment in Turkey when facing Galatasaray.
''We have the experience of playing against Galatasaray in the past and we will always remember the 'Welcome to Hell' banners,'' Ferguson told the club'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.''