Perth: England's injury crisis deepened on Friday when opening batsman Marcus Trescothick became the fifth member of the 16-member squad to join the casualty list less than two weeks before the first Ashes Test.

As England completed a technical draw – which amounted to a moral defeat – in a two- day match against Western Australia, team management revealed Trescothick has an injured right shoulder.

The injury means both England's openers are under a fitness cloud, with Matthew Vaughan still recovering from knee surgery.

In the WACA Ground warm-up clash, Western Australia slammed 313 for six wickets after dismissing England for a paltry 221 the previous day.

Nineteen-year-old left-hander Shaun Marsh, son of former Australian opener and national coach Geoff Marsh, underscored England's problems when he hit a blazing 92 from 134 balls with 15 boundaries.

England captain Nasser Hussain admitted his team had a lot of improving to do in a short time to challenge Australia. "We are not hiding behind anything – you are not going to get any excuses from me," he said.

"We have just got to improve – these are still very early days. There are no easy rides in Test cricket. There's been nothing easy wherever we have been, including Sri Lanka and Pakistan.

"And nothing that has happened here so far has surprised me. There are no easy games over here. All these chaps we have come up against are very fine players.

"There were some positives in this match. Andy Caddick had a very good game, with bat and ball. Our bowlers today stuck well to their discipline on a very flat wicket. We also took all our catches.

"Obviously there are plenty of things we have got to work on." Hussain said he was sure young bowler Steve Harmison, who has had a nightmare start to the tour, would produce once he had found his rhythm.

England's attack Friday was as unimpressive as their batting a day earlier. Pace trio Matthew Hoggard, Harmison and Caddick labored for two hours as Michael Hussey (48) and Chris Rogers (57) piled on 103 for the state's first wicket in almost even time.

Then Marsh, not good enough to get a single game with the state Sheffield Shield team last summer, peeled off some breathtaking shots in 173 minutes of left-handed artistry.

Caddick (2-57) and Hoggard (2-49) toiled diligently, but without venom, under a hot sun, while Harmison (1-89) was taught another painful lesson about the importance of accuracy on Australian pitches.

He is still trying to live down his embarrassing performance in the opening game of the tour three days ago, when he sent down eight wides – seven from successive balls – during a remarkable stint which included 16 wides.