The 100th edition of the Australian Open tennis tournament is currently underway in Melbourne. Players from all over the world have been competing in the heat of the Australian summer, hoping for a win -- this year's singles champions will take home $2.4 million dollars (U.S.). Matches are progressing today into the semifinals, with the final matches to be played on January 29. Collected here are some colorful glimpses of the 2012 Australian Open.