Coleen Rooney's barrister has accused Rebekah Vardy of "lying on oath" and deleting messages to "cover up incriminating evidence."
In his closing speech David Sherborne described the claim that a phone belonging to Vardy's PR agent, Caroline Watt, had fallen into the North Sea days after a judge had ordered it to be examined as "fishy".
Vardy, 40, left the courtroom after the barrister accused her of destroying evidence.
The last week has seen Coleen, Rebekah and Wayne take to the stand, in the costly libel battle at the Royal Courts of Justice.
Vardy has denied purposefully deleting messages and denies leaking posts on Coleen's personal Instagram to the press.
In his closing remarks, Sherbourne said the evidence showed "Mrs Vardy deleted the WhatsApp chats and has lied on oath".
"There is only one reason for her having taken such a step.
"It was done to cover up incriminating evidence.
"Mrs Vardy deliberately deleted those messages to cover up the collusion between her and Ms Watt,'' the barrister said.
Sherborne said Mrs Vardy claimed the messages vanished as she tried to export them to her lawyers.
But experts said that could not have happened.
In addition the laptop she used to perform the export had broken and had been disposed of.
"No proper explanation has been given for this deliberate destruction of relevant evidence,'' Sherborne said.
"This is yet another serious and deliberate destruction of relevant material for which there can be only one reason.''
Sherborne said all of Vardy's messages to one of the key journalists in the case had been deleted too.
Turning to the claim Watt's phone had fallen into the sea after a judge ordered that it be examined, Sherborne said: "The story is fishy enough."
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The WhatsApp messages would have appeared on both phones therefore it was necessary for it was for both to be destroyed
to complete the "cover up", Sherborne said.
