Happily soared to the top of Europe’s 2-year-old division with Group 1 wins in Ireland and France in a three-week span last fall. The success did not translate to the United States. Happily finished last as the 2-1 favorite after a troubled trip in the Breeders’ Cup Juvenile Fillies at Del Mar last November. Six months after that setback, Happily is nearing her 2018 debut in Sunday’s Group 1 English 1000 Guineas for 3-year-old fillies at Newmarket Racecourse. The loss in California has not damaged her reputation in Europe. As of Friday, Happily was the 2-1 favorite in future-book betting to win the one-mile 1000 Guineas on a straightaway course. The $744,600 English 1000 Guineas drew a field of 15, including the highly regarded Soliloquy and I Can Fly. Happily and I Can Fly are trained by Aidan O’Brien, who has won the 1000 Guineas four times. O’Brien also runs the longshots Sarrocchi and Sizzling. Happily, a Galileo filly owned by Derrick Smith, Susan Magnier, and Michael Tabor, won 4 of 7 starts last year in a season highlighted by wins in the Group 1 Moyglare Stud Stakes at seven furlongs in Ireland on Sept. 10 and the Group 1 Prix Marcel Boussac at Chantilly, France, on Oct. 1. Happily stalked the pace in the Moyglare Stud Stakes and closed from the back of the field in the Prix Marcel Boussac. In the BC Juvenile Fillies Turf, Happily raced on the inside and was steadied on the first turn. She was never closer than 10th under jockey Ryan Moore, who has the mount on Sunday. O’Brien said immediately after the Juvenile Fillies Turf that Moore “looked after” Happily when she encountered trouble. Soliloquy, a Dubawi filly owned by Sheikh Mohammed’s Godolphin Racing, will have her Group 1 debut in the 1000 Guineas. Trained by Charlie Appleby, Soliloquy won her first start of 2018 in the Group 3 Nell Gwyn Stakes at seven furlongs at Newmarket on April 18, leading for much of the race to prevail by 1 3/4 lengths over Altyn Orda, who is part of the 1000 Guineas field. I Can Fly, who was third in the Group 3 1000 Guineas Trial Stakes at Leopardstown, Ireland, on April 18, and Laurens, who won the Group 1 Fillies’ Mile at Newmarket last October, are capable of winning with their best performances. Laurens is trained in England by Karl Burke.