Topofthegame won a thrilling tussle to emerge victorious in the RSA Insurance Novices' Chase.
The giant chestnut just got the better of Santini to win by half a length at 4-1, with favourite Delta Work another one and three-quarter lengths back in third.
Topofthegame, ridden by Harry Cobden, was providing a first winner of this year's Festival for 10-time champion trainer Paul Nicholls.
Nicholls said: "That was awesome. What a fantastic ride from a young man.
"That was absolutely brilliant. He's a really smart horse. He was a maiden coming into today, but was second
in Grade One and Harry probably learnt a good lesson that day. He was unlucky the first day."
William Henry came from the clouds to deny top-weight Wicklow Brave in the Coral Cup.
Nicky Henderson's nine-year-old had only been seen once this year, being pulled up at Wincanton on Boxing Day and subsequently undergoing surgery on his wind.
Sent off a relatively unconsidered 28-1 chance, Nico de Boinville looked to have a mountain to climb turning into the straight as he battled to better his fourth in the race 12 months ago.
It was Paul Nicholls' Brio Conti who looked to be going better than anything, but then Patrick Mullins appeared on the scene on Wicklow Brave, a former Irish St Leger winner and Grade One-winning hurdler.
Just as Willie Mullins looked set to notch his third win of the week, William Henry began to charge home and won by a short head, with Ballyandy battling on for third and Brio Conti fading into fourth.
After seconds in the first two races for Henderson with Champ and Santini, he registered a winner from an unlikely source.
