Azarenka cheated using the injury time out
The WTA Tour needs to be more stringent with these so called injury time outs players have during the grand slams. I believe Azarenka used the injury time out because she wanted to cool down and hope Sloane Stephens would have a bad game and it happened.
The problem with an injury is a player can fake it. Azarenka claimed she had both a knee problem and a rib problem to give her more time. It took 10 minutes for the injury time out. It is clear to me players are cheating sometimes using this as a strategy. The WTA needs to change this rule make it more consistent and tight so players can't abuse it.