Nicky Henderson became the most successful trainer in the history of the Stan James Champion Hurdle after Buveur D'Air claimed the feature race on day one of the Cheltenham Festival.
The Seven Barrows handler has now secured six victories in the two-mile showpiece.
Just for good measure, Henderson also saddled runner-up My Tent Or Yours, who was finishing second in the race for a third time.
Jockey Noel Fehily said of the 5-1 winner: "Early on I felt I was doing too much and I thought it took me a while to get him switched off.
"He's just a very good horse. It's just fantastic. It was a great performance."
The first two horses home are owned by JP McManus, with four and a half lengths the winning distance. Petit Mouchoir was third after cutting out much of the running.