Manchester United fullback Rafael da Silva expects the Premiership race to be decided by a raft of top teams.

Rafael believes Liverpool will return to form this season.

"I believe that Manchester City, Chelsea and Arsenal are the teams that have invested heavily. We cannot forget Liverpool, for all their tradition, and Tottenham, who also did well last season," said Rafael.

"It will be difficult competing for the title, but we are confident. Manchester United is always a strong contender to win the English championship and we hope this year is no different."