After the defeat, Brzeczek surprised the waiting journalists by praising his team.
The organizers designed a route with a 17km climb before the finish line, which seemed like it might bring about some interesting developments on the rugged, narrow mountain road.
"Piatek traveled to Bosnia against our agreement," said Preetz in an interview for Kicker magazine on Sunday evening.
Elsewhere, Poland, who were playing without leading striker Robert Lewandowski, registered their first victory of the tournament in Zenica.
She will take on 15th-seeded Maria Sakkari of Greece in the last 16, who stunned Williams at the Western & Southern Open last month.
Williams said: "I tried to stay calm and be more serene after the loss of the first set. I knew it was important for me just to keep trying, just to keep going."
WADA president Witold Banka said the Agency would follow the representatives' suggestions.
"All the players have to stay in the two hotels booked by organizers without exception."
Mena struck in the 41st and 51st minutes at Estadio Victoria as the visitors secured their fifth win from eight matches.
In his video, despite saying "unhappy", Messi explained he would see out the last year of his deal because he would "never go to court" against the club. Enditem
"I wanted to go, and I was in my right to do so, because my contract said I was free. I wanted to go because I was thinking about being happy in my last years in football," he commented.