Russia's Vladimir Morozov reacts after the men's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Vladimir Morozov reacts after the men's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Vladislav Grinev competes during the men's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Vladimir Morozov competes during the men's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Vladimir Morozov competes during the men's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Vladimir Morozov prepares during the men's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Vladimir Morozov prepares during the men's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Maria Kameneva reacts after the women's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Cate Campbell reacts after the women's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Arina Surkova prepares during the women's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Maria Kameneva prepares during the women's 50m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Anton Chupkov reacts after the men's 100m breaststroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Arno Kamminga of Netherlands reacts after the men's 100m breaststroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Arno Kamminga of Netherlands competes during the men's 100m breaststroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Anton Chupkov competes during the men's 100m breaststroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Maria Temnikova reacts after the women's 200m breaststroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Daria Chikunova reacts after the women's 200m breaststroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Maria Temnikova competes during the women's 200m breaststroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Maria Temnikova competes during the women's 200m breaststroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Mikhail Vekovishchev reacts after the men's 100m butterfly final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Mikhail Vekovishchev competes during the men's 100m butterfly final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Mikhail Vekovishchev competes during the men's 100m butterfly final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Mikhail Vekovishchev competes during the men's 100m butterfly final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Hungary's Katinka Hosszu reacts after the women's 200m butterfly final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Hungary's Katinka Hosszu competes during the women's 200m butterfly final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Hungary's Katinka Hosszu competes during the women's 200m butterfly final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Hungary's Katinka Hosszu competes during the women's 200m butterfly final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Grigoriy Tarasevich reacts after the men's 200m backstroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Romania's Daniel Martin reacts after the men's 200m backstroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Grigoriy Tarasevich competes during the men's 200m backstroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Maria Kameneva reacts after the women's 50m backstroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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From left to right: Russia's Anastasia Fesikova and Kira Toussaint of Netherlands react after the women's 50m backstroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Anastasia Fesikova competes during the women's 50m backstroke final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Aleksandr Krasnykh, left, and Lithuania's Danas Rapsys react after the men's 400m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Aleksandr Krasnykh competes during the men's 400m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Anton Nikitin competes during the men's 400m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Lithuania's Danas Rapsys and Lithuania's Danas Rapsys reacts after the men's 400m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Anton Nikitin competes during the men's 400m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Russia's Anna Egorova reacts after the the women's 400m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Austria's Marlene Kaler swims at the women's 400m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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Austria's Mikaela Sheridan swims at the women's 400m freestyle final at the Swimming World Cup 2019 event, in Kazan, Russia.

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