In 2019, Sedney dealt with a hamstring injury, complicating her preparations for the European U20 Championships in Boras, Sweden. Sedney ended up competing in the 200 metres where she ended up in 10th place and in the 4 x 100 Metres Relay where she won silver with the Dutch relay team (Bisschops, Sedney, Demi van den Wildenberg and N'ketia Seedo).