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The Frenchman was driving with his co-driver along a road that will be used in Rally Poland when they hit a car travelling in the opposite direction head on, local media reported.
Baumgartner, Trauner and Arnautovic scored in a 3-1 win for Austria.
Striker Wout Weghorst came off the bench to snatch a late winner with his first touch and give the Netherlands a deserved 2-1 comeback victory over Poland in their Group D opener.
The incident occurred in the St Pauli district of the city ahead of the Poland-Netherlands match in Hamburg's Volksparkstadion.
Ashiq Raghu (23), son of Abhilash and Bindu, died at Zabki in central Poland on April 1.
It is a fourth straight visit to the continental finals for Ukraine who take their place in Group E with Belgium, Slovakia and Romania.
Weronika Falkowska and Katarzyna Piter lost 6-4, 6-4 to Heather Watson and Yanina Wickmayer in the doubles final.
The Women's Tennis Association said it was aware of the situation.
The player was taken into custody in the southern Polish region of Silesia, prosecutors said in a statement. The player and his team were not publicly identified.
The van maker, a division of Mercedes-Benz, has signed a declaration of intent with the Polish government and other partners to add the van factory to its Jawor site where it makes combustion engines and batteries for Mercedes-Benz Cars.