For the first time since the show was created in Abu Dhabi, Roger Federer will not participate. Probably this decision has been influenced by so many
performances the Swiss will make in South America in December. A starting list to scream that involves the presence of Novak Djokovic, Andy Murray, Rafael Nadal, Thomas Berdych, David Ferrer and Janko Tpsarevic.
Do you know how to improve
your return to the first serve ?