Bred and owned by Godolphin and trained by Charlie Appleby at Moulton Paddocks in Newmarket, Suffok, Space Blues was, at the end of the 2020 Flat season, rated 125 by Timeform, placing him joint-fifteenth on the list of older horses trained in Europe. Indeed, the four-year-old son of Dubawi enjoyed an excellent campaign in 2020, winning all four of his five starts, including the Group One
Prix Maurice de Gheest – his first victory at the highest level – at Deauville in August.
Space Blues ran just once as a two-year-old, making an impressive winning debut in a lowly maiden stakes race, over an extended mile, at Nottingham on November, 2018. However, after two subsequent defeats at distances beyond a mile, he was subsequently campaigned over 7 furlongs, or shorter, as a three-year-old and began his ascent through the ranks. He recorded his first Listed race success in the Surrey Stakes at Epsom in May, 2019 and, although narrowly beaten on his first attempt in Pattern company, in the Group Three Jersey Stakes at Royal Ascot, rounded off his three-year-old campaign with excellent placed efforts at Group One level, in the Prix Jean Prat and the Prix Maurice de Gheest, both at Deauville.
Space Blues made a low-key return to action in the Nad Al Sheba Turf Sprint, over 6 furlongs, at Meydan in March, 2020, but resumed winning ways in the Listed Spring Trophy Stakes, over 7 furlongs, at Haydock in June. He won his first Pattern race, the Group Three Prix de la Porte Maillot at Longchamp, later that month and followed up with another dominant display in the Group Two Lennox Stakes at Goodwood in July. However, the best was yet to come at Deauville less than two weeks later, when he unleashed a potent turn of foot to secure his first Group One victory. Space Blues missed his final intended engagement of the season, in the Group One Prix de la Foret at Longchamp in October, due to a training setback, but reportedly stays in training as a five-year-old.