For me it's talking almost immediately after a really challenging call.
In tennis, players can challenge calls based on a video-computer system.
Several times he challenges calls, but to no avail, Hawkeye rules against him.
Mr. Barroso also challenged calls by Washington and from many in Europe for a retreat from policies of austerity.
Mr. Barroso challenged calls by Washington and also by many in Europe for a retreat from policies of austerity.
Schuerholz said baseball expected challenged calls to be resolved in about 1 minute 15 seconds, which seems optimistic.
And like the National Hockey League, reviews for most of the challenged calls will be evaluated by a crew of officials monitoring games remotely at the league headquarters.
Coaches in American football can challenge calls with video replay.But video is impractical in continuous-action sports like football, where officials must stop play to use it.
Major League Baseball announced on Thursday that it planned to greatly expand instant replay, starting in 2014, with managers having the option to challenge calls they believe the umpire missed.
Federer had only 18% (five for 28) of his challenged calls overturned in last year's U.S. Open, one of the worst percentages in the entire tournament.
