Manchester United versus Liverpool is one of the great rivalries of the Premier League but Barnes has warned Ole Gunnar Solskjaer about the dangers of trying to get his side to put on an exciting attacking display in front of their own fans. United currently sit 12th in the table and have only taken nine points for eight matches, while Liverpool have made a fantastic start to the season. The teams are currently separated by 15 points and Jurgen Klopp has not only seen his side take maximum points, but Liverpool have also conceded the fewest amount of goals, six, of any team in the division. And Barnes thinks Solskjaer should change his side’s style of play for the match on Sunday, despite the pressure on the Norwegian to play open attacking football. “If Manchester United now under Ole Gunnar Solskjaer are going back to trying to play an exciting, open game, I think Liverpool will destroy them,” Barnes told the Evening Standard. “If you go toe-to-toe with Liverpool and try and play an open game… even Manchester City adapt their game to play against Liverpool! “If Manchester United come and say, ‘We’re the home team, let’s play an open game’,…