This is a very old entry — images are small, formatting is off.
Established in 1902, Deutschen Tennis Bundes (DTB for short, German Tennis Federation for English) is the governing body of tennis federations and clubs in Germany, with more than 1,800,000 members. A new logo was introduced this month. Not clear if the smile was intentional or if it’s meant to be a tennis ball. More at Das Design Tagebuch, translate if needed.