There's double action tonight on American TV, and Bad Left Hook is the boxing fan's destination for interactive coverage. I'll be out celebrating my birthday, though I plan to DVR the HBO card and probably sneak back to the office at some point and catch the main event of the Showtime PPV, so I'll have my thoughts on the fights sometime on Sunday, hopefully. Or I won't because I'll be too hopped up on the sweet Kentucky bourbon tonight. We'll see. Play it by ear, as they say.

Showtime pay-per-view goes live at 9pm with a Top Rank card at the MGM Grand in Las Vegas, headlined by a 12-round junior middleweight clash between Miguel Cotto and Ricardo Mayorga. On the undercard, Yuri Foreman faces Pawel Wolak (10 rounds, 154), Miguel Vazquez faces Aussie brawler Leonardo Zappavigna (12 rounds, 135) and Baltimore Ravens safety Tom Zbikowski gets a glamour shot in a four-round heavyweight bout against some guy from Kentucky. (Sorry, Richard Bryant.)

HBO goes live at 10:30 from Foxwoods in Connecticut. In the main event, Sergio Martinez defends the world middleweight championship against Sergiy Dzinziruk. The co-feature is also a middleweight clash, as Ireland's Andy Lee takes on Scotland's Craig McEwan. Lee will be without trainer Emanuel Steward for this one, as Steward will be in Vegas handling Cotto, and Martinez will also be without his normal lead trainer, Gabriel Sarmiento. Gabriel's brother Pablo will take over for the evening.