Chopra was delighted to win on his comeback from a groin injury
Beatrice Chepkoech of Kenya, the 3,000 metres steeplechase world champion in 2019, passed this season's world leader Sembo Almayew of Ethiopia with a lap remaining to win in 9:05.98.
American champion Tyson Gay continued his impressive buildup to next month's World championships on Thursday by winning the 100 metres at Lausanne's Athletissima Diamond League meeting in 9.79 seconds.
