Cricket Australia XI 176 for 9 (Hearne 106*, Cook 4-15) trail England Lions 223 (Davies 54, Gannon 5-27) by 47 runs

Cook has established himself as one of the most prolific seamers in the Rothesay County Championship, having taken more than 300 first-class wickets at an average under 20, and the 27-year-old Essex man proved his class on Australian soil as he reduced the hosts to 18 for four.

Three of his wickets were caught behind the wicket, as he operated at times with four slips, and he found just enough movement to trap this season's Sheffield Shield top runscorer Henry Hunt plumb in front.

James Rew held a good diving catch down the leg side to remove 20-Test veteran Peter Handscomb before Hearne - who is yet to make a first-class century - effectively counter-attacked with an unbeaten 106 from just 62 balls.

Davies had earlier won the toss and struck four sixes in a 57-ball fifty at the top of the order, bringing up his milestone by dispatching spinner Corey Rocchiccioli over the midwicket fence.

Warwickshire team-mate Hamza Shaikh was the next highest scorer with a patient 34 while fellow teenager Freddie McCann added 30.