Five things to watch at the Olympics on Friday

(CNN) -- The United Stateshas injury worries about the track as the basketball team worries in regards to a familiar foe.
Allow me to share five what to watch at the Olympics on Friday:
1) Men's 4x400 relay: U.S. hopes to carry on streak
The usa is lucky to be in the last, lucky, that is, that Manteo Mitchell found a method to finish his opening leg despite a broken fibula. The United States have to get a replacement for him as they challenge the Bahamas for the gold. Also be mindful of England, which will have almost all of the 80,000 fans at Olympic Stadium cheering for the children.

Final is a 9:20 p.m. London time (4:20 p.m. ET)
2) Basketball: U.S. having dreams about another last
TeamUsfaces veteran Argentina in what is seen as a tough semifinal matchup for that dominant Americans. Sure the us beat them 126-97 inside preliminary round, however it was obviously a one-point game at half and surely the Americans won't score 42 points from the third quarter again. Argentina figures to slow the sport down slightly and they are expected to have point guard Pablo Prigioni back.
London 2012: Live blog
Semifinal game begins at 9 p.m. London time (4 p.m. ET).
3) Cycling: BMX, baby
Eight riders, a great deal of jumps and bumps, some sharp turns, a lot of crashes. Because the New York Times said: "Given the carnage on display Thursday, it truly is safe to assume that whoever designed the BMX racetrack really dislikes BMX racers." Both males and females compete in cases where with semifinals and final on Friday.
Soccer: U.S. women beat Japan
The primary events begins at 3 p.m. London time (10 a.m. ET)
4) Boxing: Superheavyweight super fight
Defending superheavyweight champ Roberto Cammarelle takes on world No. 1 Magomedrasul Medzhidov. Cammarelle, from Italy, is one kind of only eight boxers to win three medals (they are already guaranteed leastways a bronze.) Like his opponent, Medzhidov is for the shorter side to the weight class, but he accocunts for for any usual reach disadvantage with a powerful punch.
Swim coach: Australia getting 'soft'
Boxing begins at 1:30 London time (8:30 a.m. ET). Superheavyweight matches can start 10:30 p.m. London time (5:30 p.m. ET)
5) Women's 4x100 meter relay: Chance at redemption
Running with two backups, the Usacame in just a hair of breaking the Olympic record. On Friday, Carmelita Jeter and Allyson Felix will be during the lineup with the Americans within their matchup against Jamaica. It really is unclear if Jeneba Tarmoh, Tianna Madison or Bianca Knight will run again. Each team is looking to get redemption as both teams botched handoffs at Beijing.
Genocide survivor leads path for Rwandan athletes
Round hands down the relays begins at 8:40 p.m. London time (3:40 p.m. ET)

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