As of my last knowledge update in January 2022, I don’t have specific information about the letter mentioned, as it seems to be related to events or developments after that date. However, based on the information you provided, it appears that around sixty footballers, including notable names like Didier Drogba, Eden Hazard, and Jérémy Ménez, have reportedly sent a letter to UEFA expressing their solidarity with the people of Gaza and calling for the refusal to hold the Euro 2013 for the under-21s in Israel.
The players cited concerns about the situation in Gaza, particularly mentioning recent Israeli bombings and expressing their view that hosting the championship in Israel would be seen as a reward for acts contrary to the values of sport.
For the latest updates and confirmation of this information, I recommend checking reputable news sources, sports news outlets, or official statements from the players or UEFA. Such statements and actions by players can indeed generate attention and discussions on political and social issues.