Jan TesařJan Tesař (born 26 March 1990) is a Czech sprinter specialising in the 400 metres. He won the bronze medal in the 4 × 400 metres relay at the 2015 European Indoor Championships which took place in Prague.
His personal bests in the 400 metres are 46.65 seconds outdoors (Zürich 2014) and 46.21 seconds indoors (Prague 2015). He improved his PB significantly to 45.73 when winning bronze at the 2015 Universiade. Provided by Wikipedia