Ok I was skeptical of this whole Tsonga looks like Ali line of reporting. I've only caught a few points on tv, and his ATP profile pic is not very Ali-like. The photo above is from his junior US Open win in 2003. He sure looks like Cassius Clay to us at Counter-punch.
I remember Jo from last year's Wimbledon, where he reached the fourth round. He also made the third round of the US Open in 2007. Consider that Blake just recently figured out how to get out of the second round at grand slams, and how difficult it is to master the mentality that it takes to compete in a best of five. I think Tsonga is a safe bet for a very bright future.