RACING REPORT CHESTER:AIDAN O'BRIEN predictably dominated proceedings on the final day of Chester's May meeting to continue his fantastic start to the month.

The master of Ballydoyle completed the Guineas double at Newmarket last weekend and unleashed two more potential stars on the Roodee.

Guineas hero Camelot is already odds-on with some bookmakers for next month’s Investec Derby and stablemate Astrology could join him at Epsom after a dominating performance in the Stobart Barristers Dee Stakes.

In a field depleted by the defection of likely favourite Bonfire, 11 to 10 market leader Astrology was sent straight to the head of affairs by Joseph O’Brien. It was clear before the home turn that his three opponents were struggling to keep up and O’Brien only had to keep his mount up to his work in the straight to come home with a full 11 lengths in hand over Oxford Charley.

Paddy Power cut Astrology to 20 to 1 from 33 to 1 for the Derby, although the trainer insisted plans for the race have yet to be finalised with key trials coming up in the next week.

The same father-son combination soon found the target again as Memphis Tennessee looked an improved performer in the Boodles Diamond Ormonde Stakes. The four-year-old ran creditably to finish fourth in last year’s Derby at Epsom and was a similarly promising third in the Irish equivalent at the end of June. Making his first start since, his only conceivable danger was the talented Brown Panther. As that rival was beaten a long way from home, it was a relatively easy task for even-money favourite Memphis Tennessee and he accounted for Vivacious Vivienne by four lengths.

Ballesteros came with a rattling run in the final furlong to follow up his recent Sandown success in the edwardshomes.co.ukEBF Handicap. The 11 to 8 favourite, trained by Brian Meehan, blitzed down the near rail to storm past the pace-setting Sonko in the hands of Ryan Moore and win by two and a half lengths.