Josh Hazlewood has warned Jason Roy that he could find opening in Test cricket difficult Getty

Josh Hazlewood, the Australian pacer, reminded England opener Jason Roy that he could find it difficult to translate his success in limited overs cricket to the Test arena ahead of the first Ashes Test.

The Surrey batsman, who had a successful time in the recently-concluded World Cup, averages over 45 in ODIs. However, playing against the Dukes ball and on surfaces with a good covering of grass could turn out to be a different proposition altogether. Roy, who came into the reckoning with a superlative ton versus Essex in the 2018 County Championship, averages just over 38 in first class cricket. He made his Test debut in the Lord's game against Ireland, scoring a fine fifty in the second essay.

"We'll see how Roy goes in Test cricket. He has only played one Test match and it's a lot different opening the batting in a Test than a one-day game, that's for sure," said Hazlewood. "In England, opening is probably the toughest place to bat, which probably made Alastair Cook's record all the better. To play attacking cricket in those conditions is tough," he added.

Meanwhile, the Australian think-tank has the task of picking their pace attack amongst a slew of worthy candidates. Hazlewood, Mitchell Starc, James Pattinson, Peter Siddle, Pat Cummins and Co. are all competing for the pace bowling slots.

"We all know each other, we train a lot with each other whether it's Pattinson, Siddle or Michael Neser. We know each other pretty well and I guess the only way to get to know them more is by playing with them. I've played with 'Patto' a fair bit now over the years so I know his ins and outs and what makes him tick on the field. Peter Siddle the same. I don't think it matters who is going to play, we all know each other really well," Hazlewood noted.

Australian bowlers also have to wade through a gruelling schedule during their tour of England, with the recently-concluded World Cup and the five Ashes Tests crammed in a space of 45 days. "I think the (fast bowlers) are happy to play it by ear a little bit, obviously depending on how much we bowl per Test. You can't look too far ahead I think. You can map certain things out if things happen, but you've got to play it by ear I think with Test cricket.

"You might get away with a Test with 30 overs under your belt which is fine. It's when it goes up to 45 to 50 that you start to reassess things and look at different options. There's six quicks here, which is great, so more than happy to rotate or conditions picking those bowlers, we'll see how we go.

"I think it would be a very good effort to play all five, especially with my last two years, I've missed a few Tests with injury. I'd be really happy with four (Tests), three or four even. It's such a tight schedule. Five would be great if we got away with a couple of cheap innings, bowling 30 (overs) for the Test or something like that, it'd be great."