Taylor Swift
Taylor Swift claims DJ David Mueller groped her in 2013Neilson Barnard/Getty Images

Taylor Swift's former bodyguard has claimed that he saw a DJ 'flip up' the pop star's skirt before groping her.

Testifying in the ongoing groping lawsuit filed against former DJ David Mueller, 55, Greg Dent said the alleged assault left Swift feeling 'uncomfortable."

Giving evidence in the fifth day of hearings the singer's former bodyguard was at the meet-and-greet session before one of her concerts four years ago when the alleged assaulted is said to have occurred.

"When he went to put his arm behind her, I saw her skirt go up and his hand went under there," Dent told the jury. "I saw his hand under her skirt... Her skirt went up... She jumped.

"I knew she was uncomfortable. I saw her push her skirt down and move away." He said the Shake It Off singer moved towards Mueller's girlfriend, who was standing on Swift's other side.

Asked by Mueller's lawyer Gabriel McFarland repeatedly why he didn't intervene he explained that he followed the singer's direction who continued with the photo session for fans and invited guests.

He said the singer often allowed appropriate contact with fans in such meet-and-greet sessions, adding that he felt "she was far too friendly".

While he did not believe Mueller was a threat to Swift Dent added: "I thought it was a violation of her body."

Following the groping allegations Mueller accused Swift of slandering him to his radio station. Mueller was fired by radio station KXGO two days after the 2013 incident and has been unable to find a job since.

Swift, who is counter-suing Mueller, alleging he assaulted her, took the stand herself on Thursday when she testified that Mueller "stayed latched on to my bare ass cheek as I lurched away from him."

Recalling the moment he allegedly sexually assaulted her at a meet-and-greet in Denver in 2013, the 27-year-old pop star said: "It was a definite grab. A very long grab."

The Bad Blood songstress continued: "It was a very shocking thing that I have never dealt with before. After this happened, it was like a light switched off in my personality."

Asked what happened after the meeting, Swift said: "I just said in a monotone voice, 'Thank you for coming' and then they were gone."

Swift's assistants testified in depositions that as soon as the photo session ended, the singer told everyone in the room about the incident.

Mueller, denies groping the singer and is suing Swift for $3 million for his lost current and future wages.

In a symbolic gesture Swift has asked for one dollar in damages if she wins and says she wants the case to serve as an example to women who have been assaulted.