Roger Charlton admitted Observational will have to raise his game to be a Derby threat.
The Beckhampton trainer watched as his Galileo colt scrapped for Listed Cocked Hat Stakes glory at Goodwood yesterday.
The three-year-old – and jockey James Doyle – overcame trouble in running to defeat market-rival Marzocco by a neck in the highlight of the May Festival’s second day.
Charlton was impressed with the way he fought out the win on soft ground.
But he admitted the performance – on the colt’s third run under rules – was some way short of Derby quality.
The trainer said: ‘None of them looked to like the ground and James (Doyle) said he definitely would like better ground.
‘That was a tough performance, especially as he was disadvantaged when he missed getting the run up the stands rail and he toughed it out well.
‘Most owners love a Derby runner and I am sure Barry (Hurley, owner) is no different.
‘Realistically, you would have to think that was a 106 or 107-rated performance, so he would have to improve considerably but we will see.’
Yesterday’s card – the second of the three-day meeting – featured six other races.
Parsley kicked off with a 9/4 victory in the Spitfire Maiden Auction Stakes for jockey Richard Hughes and trainer Richard Hannon.
And the Goodwood favourites wasted no time in returning to the winners’ enclosure as they teamed up to take the Reheat Stakes with 7/4-shot Red Refraction.
Hughes sealed a personal hat-trick when he steered Intrinsic to IBA Stakes victory at 9/4 for Robert Cowell.
Luke Morris won the Goodwood Flying School Fillies’ on 11/4-shot Tioga Pass, while Starlight Serenade took the Goodwood Aero Club Fillies’ Stakes at 3/1.
Groundworker won the TurfTV For Betting Shops Stakes at 6/4.
The final day of the meeting begins at 1.50pm today and features seven races.