Meydan Racecourse on 25 March. He was in contention from the start and was sent to the front by Buick approaching the last quarter mile. He maintained his advantage until the last hundred yards but was then overtaken and finished third to the Japanese filly Vivlos and the French colt Heshem. On his return to Europe the colt contested the Lockinge Stakes at Newbury in May and started 7/4 favourite in front of seven opponents headed by Galileo Gold and the Irish filly Somehow. Ribchester took the lead from the start and set a steady pace before accelerating in the last quarter mile. He drew away from the field in the closing stages and won by three and three quarter lengths from Lightning Spear. Richard Fahey admitted "I was quite nervous today and I don't do nerves", before adding "It was a big day, you just want to perform and, God, he did. This guy's special". At Royal Ascot on 20 June Ribchester started 11/10 favourite against fifteen opponents in the Queen Anne Stakes. After tracking the leaders he went to the front a furlong out and won by a length and a quarter from Mutakayyef in a new course record time of 1:36.60. Buick described the winner as "a fabulous horse... the best miler I've ridden". Ribchester was generally expected to add to his tally of Group 1 wins in the Sussex Stakes at Goodwood on 2 August especially after his main rival Churchill was withdrawn on account of the exceptionally testing conditions. Racing on soft, wet turf in heavy rain, Ribchester led for most of the way but was overtaken in the final furlong and despite rallying strongly in the closing strides he was beaten a neck by the 20/1 outsider Here Comes When. Ribchester returned to the track on 10 September and started favourite for the Prix du Moulin, run that year at Chantilly Racecourse. His opponents on this occasion were Lightning Spear, Taareef (Prix Messidor), Inns of Court (Prix de la Porte Maillot), Robin of Navan (Critérium de Saint-Cloud) Lady Frankel (Prix de Lieurey) and Masaat (Hungerford Stakes). After tracking the leader Robin of Navan, Ribchester went to the front 400 metres from the finish and stayed on well to win by three quarters of a length from Taareef. Assessment In the official ratings for European two-year-olds of 2015, Ribchester was given a rating of 113,