Where`s a winner for Mills Where Or When gave ailing Terry Mills the perfect tonic by enabling him to put one over champion trainer-elect Aidan O`Brien at Newmarket today. After Johannesburg`s Middle Park Stakes romp, stable-companion Della Francesca was a well-backed evens favourite to repeat the steam-roller treatment 24 hours on and lift the Somerville Tattersall Stakes for all-conquering Ballydoyle. But his jockey Mick Kinane was hard at work a quarter-mile from home in the seven-furlong contest and though his mount responded well in the final 200 yards he was unable to catch 6-1 shot Where Or When, who had led inside the final furlong under Richard Quinn and held on by a head. Third-placed Savannah Bay (14-1) was another length and three quarters back in the Group Three event, with long-time leader Redback fourth. Winning trainer Mills, a waste-disposal millionaire who trains around 40 horses in Epsom, had to miss the victory of a juvenile he bought for 26,000 Irish guineas as a foal. His son and assistant Robert explained: 'When he came back from Ascot last Saturday he had a glass of wine in a local bar and keeled over with a virus and has been in bed ever since. But he has just rung me so he must be getting better!' The winner had finished only fourth in the seven-furlong Solario Stakes at Sandown previously. But Mills jnr said: 'We were shell-shocked that he got beaten. But he was pushed out onto Esher high Street at one point and the winner got first run on him - he has got to have cover and he ended up going about a mile and a quarter in the end. 'You have got to respect Aidan O`Brien`s horses the way they have been running but we have always thought the world of him.' That high opinion could be put to the test in the Group One Dewhurst Stakes back here a fortnight tomorrow. 'He is in the Dewhurst and we will have to see how he come out of this race but it will be up to dad,' Mills jnr said. 'But it is a dangerous time of year -getting towards the end of the season - and this will be a nice horse for the future.' Swedish raider Tio Pepe`s bid ended in anti-climax as he bolted around five furlongs past the start after one of his irons broke and he was withdrawn by trainer Diego Lowther.