Paul Scholes scored twice as Manchester United won an entertaining pre-season encounter against Celtic.
Skipper Scholes set the seal on the win for the visitors
Defender Jonathan Evans lashed in a volley after Celtic failed to clear at the back post after just eight minutes.
And Paul Scholes pounced on some more lacklustre defending to turn in a Kieran Richardson free-kick at the near post before slotting a simple second.
The result will cause concern for Bhoys boss Gordon Strachan with the start of the SPL season just three days away.
Celtic have played seven friendlies ahead of Saturday's campaign opener against Kilmarnock and have recorded just one win, against Everton.
But Strachan said the biggest lesson from the night was that "their second team is far better than our second team".
The former United player added: "We don't just dismiss it - that would be foolish and naive and not respecting our opponents.
"What we need now is for our players who think they're back-up players for the last couple of years, that they can't be back-up players.
"It's asking too much of the mainstays and the names that have been bringing success to the club for the last few years. The back-up players need to really back us up.
"To be fair that was the first time that many of them got 90 minutes - I think that affected us."
The visitors never looked in danger of letting their early advantage slip and had the edge in all aspects of an end-to-end match.
But for Poland international keeper Artur Boruc the score would have been even more telling in United's favour.
Boruc made a wonderful one-handed save to parry Paul McShane's powerful header, and then late on produced a double save to deny Guiseppe Rossi and David Jones.
I think he brings a better order to your play, better composure and patience about it
Sir Alex Ferguson on Scholes
And he stood tall to deny Scholes when he beat the offside trap with amazing ease after 84 minutes, but could do nothing as the United skipper stabbed in the rebound.
The only thing the home support had to cheer came in the final minute when Scholes played in Liam Miller and the former Celtic player dragged his effort wide with only Boruc to beat.
Sir Alex Ferguson was particularly delighted to see Scholes firing on all cylinders having missed the second half of last season.
"I think he brings a better order to your play, better composure and patience about it," said the Red Devils boss.
"He is never in a hurry, he's got everything sorted out in his head, he's got such good vision.
"The most important thing, I think he loved playing with the young players and he really enjoyed it."