an Entity references as follows:
The 2011 Poznań Porsche Open powered by Enea was a professional tennis tournament played on clay courts. It was the eight edition of the tournament which was part of the 2011 ATP Challenger Tour and the Tretorn SERIE+ tour. It took place at the Park Tenisowy Olimpia in Poznań, Poland from 16 to 24 July 2011, including the qualifying competition in the first two days.