The first international match between Great Britain and the United States was played at Gleneagles on 6 June 1921, the day before the start of the 1921 event.
The leading 16 players then played knock-out match-play on the following two days with £500 prize money.
Players outside the top 16 were eligible for a 36-hole consolation event on the final two days with £115 prize money.
Massy reduced the lead to 2 with four holes to play but Duncan won the 15th and halved the 16th.
Mitchell's 71 on the first day remained the best stroke-play round of the week and he collected a further £10 prize.
As in 1920 the leading 16 players qualified for the match play stage but the semi-finals and finals were extended to 36 holes.
The King's course was changed from that used in 1920 with the original 11th and 12th replaced by two short holes, shortening the course to 6,125 yards.
Hagen won his first round match but lost to Thomas Renouf in the afternoon.
The leading 32 players now qualified for the matchplay stage with just the final played over 36 holes.
Ray led by three after 11 holes of the morning round, but Mitchell finished well to level the match at lunch.
Rowland Jones and George Oke led the qualifying on 143 and shared the £25 prize.
there was a six-hole playoff with Arthur Butchart and Tom Williamson advancing to the match play stage.
[10] Arthur Havers met Frank Ball in the final, played in a strong wind.
Ted Ray had two rounds of 72 to lead the qualifying, a stroke ahead of Ángel de la Torre.
James Ockenden took 29 for the six holes, including a 7, and missed out; George Duncan being one of the six who qualified.
[12] Two of the leading British golfers, George Duncan and Abe Mitchell contested the final.
Freddie Beck, José Jurado and David Millar making it through the six-hole playoff.
Boomer was well known, having won a number of continental open championships and the Daily Mail Tournament early in the year.
Herrington won the first two holes of the final but Boomer had levelled by the sixth and was four up after the morning round.
Bill Mehlhorn won the qualifying win a score of 140, two ahead of Tom Barber and Archie Compston.