The Ardennes classics[1] are three cycling classics held in mid-April in the Belgian Ardennes and southern Limburg in the Netherlands: Liège–Bastogne–Liège,[2] La Flèche Wallonne[3] and Amstel Gold Race.
Gilbert also won the Brabantse Pijl, another important hill classic in mid-April, winning the "quadruple" that year.
Other riders to win all three races, though not in a single year, are Danilo Di Luca, Michele Bartoli, Eddy Merckx, Bernard Hinault and Tadej Pogačar.
[5][6][7] Anna van der Breggen immediately clinched the triple by winning all three races in 2017, being followed by team-mate Lizzie Deignan in second and Katarzyna Niewiadoma in third in all three events.
Later in the year, there are two similar 'trebles' in Italy: the Trittico Lombardo with the Tre Valli Varesine, Coppa Ugo Agostoni and Coppa Bernocchi in the Lombardy Region, and the Trittico di Autunno (Autumn Triptych) with Milano–Torino, Giro del Piemonte and Giro di Lombardia.