To Watch Tonight

What to watch in your $5,000 tree house ... • Boxing: Fernando Beltran vs. Takalani Ndlovu, for vacant IBF featherweight title, at Nashville (9 p.m., ET). Takalani Ndlovu to you, too. [ESPN2] • NFL preseason: Houston at Dallas (8 p.m., ET). Yet another game Hank Hill will miss due to Bobby's bell choir recital. [CBS] • Tennis: ATP/WTA Tour, Pilot Pen, men's semifinals, at New Haven, Conn. (7 p.m., ET). My Fernando Verdasco Fathead is looking tall and proud. [ESPN2] • Olympics: Track & Field — Gold Medal Finals: Men's 4x100-meter Relay, Men's Pole Vault, Women's 4x100-meter Relay, Women's Long Jump, Women's 5000-meter, Men's Decathlon 1500-meter; Men's Diving — Platform Semifinal (live); Gymnastics — Rhythmic Competition (8 p.m. to midnight, ET) [NBC]; Boxing — 48kg, 54kg, 60kg, 69kg, 81kg, 91kg-plus, semifinals (5 p.m. to 8 p.m., ET) [CNBC]; Women's Field Hockey Gold Medal Game (6 p.m. to 8 p.m., ET) [Oxygen]