The Tooting Bec Cup is a trophy currently awarded by the Professional Golfers' Association of Great Britain and Ireland to the association member born in, or with a parent or parents born in, the United Kingdom or Republic of Ireland who returns the lowest single-round score in The Open Championship.
Inaugurated in 1901 the Tooting Bec Challenge Cup was originally a separate competition. From 1910 it was awarded to the winner of a southern section qualifying competition for a major tournament and then since 1924 it has been awarded to the best round in The Open Championship by a British or Irish member of the PGA. It is the PGA's oldest trophy, predating the northern section's Leeds Cup which was first contested in 1902.
The Tooting Bec Challenge Cup was originally a 36-hole stroke play tournament organised by the London and Counties Professional Golfers' Association, the forerunner of the Professional Golfers' Association. The tournament was held on 15 October 1901 at the Tooting Bec Golf Club, Furzedown and the cup was donated by the Tooting Bec club. Of the 50 members who entered 46 played. J.H. Taylor won the event and was presented with the cup by the club captain, Norman Bailey. With the formation of the PGA in late 1901, the cup became an event organised by the southern section of the PGA.
Since 1924, it has not been a standalone tournament, and the trophy has been awarded to the PGA member from the United Kingdom or Republic of Ireland who records the lowest single-round score in the Open. The precise qualification rule has varied. Henry Cotton did not receive it in 1934, despite his rounds of 65 and 67, because at the time the award went "to the member of P.G.A. living in Great Britain who accomplishes the best single round during the championship" and Cotton was then living in Belgium.