The second referee checks the score sheet regarding the service rotation. Furthermore, he checks the balls before the match.
The second referee checks whether the correct player is setting up to serve. He decides upon
It is on the second referee to authorize time-outs and measure their length. He signals court-switches.
During the intermission between the first and second set, the second referee has to ask the teams about their choice for the next set (service, reception, side) as well as the service rotation.
After the match, the second referee has to check and sign the score sheet second to last.
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