|Liverpool's Steven Gerrard (L) goes up against Chelsea's Salomon Kalou during their UEFA Champions League semi-final second leg match|
Liverpool star Steven Gerrard has predicted a wide-open 2007/08 Premiership with several teams challenging for the title.
Liverpool and Manchester United have both splashed out on summer signings, while Chelsea and Arsenal remain dangerous, he said.
"You expect all the big clubs to make signings and there's also clubs that finished below us that are making big signings," said Gerrard. "Chelsea are upset at losing out to Manchester United and Arsenal have young players who have more experience now.
"I think it will be a tough title race this year and I think more teams will get involved."
Portsmouth coach Harry Rednapp, whose team face Fulham in the opening match here on Tuesday, said it could be the most hard-fought season yet. "It's going to be a very tough Premier League - the toughest in history," he said.
"Lots of teams have improved - Fulham have brought in players and so have Sunderland, West Ham and Newcastle."
Liverpool have signed Fernando Torres, Ryan Babel, Andriy Voronin and Yossi Benayoun, while Manchester United are hoping Carlos Tevez will join new signings Owen Hargreaves, Nani and Anderson.