Dave Grohl accused wife Jordyn Blum of having a ‘flirty’ relationship with her ‘hot’ tennis coach to detract from his own infidelity before shock baby reveal

Dave Grohl was called “crazy” by his wife Jordyn Blum after he accused her of having a “flirtatious” relationship with her tennis coach in a series of heated arguments, before confessing to his own infidelity.

The 55-year-old Foo Fighters frontman put an end to his “nicest guy in rock” image this week when he revealed on Instagram that he had recently fathered a child with another woman.

But in the months leading up to the shock announcement, a “jealous” Grohl had been questioning Blum, 45, about her relationship with her “handsome” coach, Christopher Crabb, 54, in a move people inside said was an attempt to distract from his own misdeeds.

“Dave Grohl has been jealous of Jordyn’s handsome tennis coach for some time now,” an insider exclusively told DailyMail.com.

“They had a fight about him, and Dave thinks they flirted. Jordyn told him he was crazy to even think that. But Dave moved on.”

Blum has been training with Crabb for years, sometimes holding as many as three sessions a week at his $1.4 million Tarzana estate, where he coaches celebrities like Pete Wentz, Hillary Duff and Zach Braff on his bright blue tennis court.

Other notable clients include Donald Faison, Jeff Probst, husband and wife Nancy and Steve Carell, brothers Elle and Dakota Fanning, and Grohl, who has taken lessons.

The tanned, blond coach regularly posts tennis tip videos, starring his dog Sierra, on his Instagram account. The account has just over 2,000 followers, including Blum.

The former model and producer appears in several clips, with Crabb calling her a “great student.”

“I’m here with Jordyn Grohl, one of my amazing students,” he says in an October 2022 clip. “She’s really solid.”

Blum, who has been playing and competing in tennis for seven years, is seen wearing her trademark dark glasses, a black tennis skirt, a pink Fila T-shirt and flashing her engagement ring.

A month later he brought her in for another video, set to the Foo Fighters hit Learn to Fly, asking her to demonstrate a ‘Loop vs straight take back’.

In July, he posted a photo of Blum and Grohl together at Wimbledon, writing, “So happy to see my students, Dave and Jordyn. They always look stylish on and off the court.”

But according to the insider, Grohl has been “jealous of Jordyn’s handsome tennis coach for a long time.”

“They’ve had a fight about him and Dave thinks they’ve been flirting,” they added. “Jordyn has told him he’s crazy to even think that. But Dave has moved on.”

They continued, “She gets coaching at least three times a week near her parents’ house. Jordyn now believes Dave is trying to cover up his own indiscretions by accusing her.”

The source insisted that nothing romantic ever happened between the two.

DailyMail.com has contacted representatives for Grohl and Crabb for comment.

Grohl and Blum’s apparent 21-year marriage was disrupted this week when he revealed he has fathered a fourth daughter with an unknown woman.

The former Nirvana drummer shares the names Violet (18), Harper (15) and Ophelia (10) with Blum.

“I recently became the father of a new baby daughter, born out of wedlock,” he wrote in a statement posted to Instagram on Tuesday. “I plan on being a loving and supportive parent to her.

“I love my wife and my children, and I am committed to earning their trust and forgiveness. We are grateful for your attention to all the children involved as we move forward together.”

Blum is comforted by her good friend Kate Hudson, who is available 24/7 and has offered to move in with her if necessary in the aftermath of the argument.

Less than 24 hours after Grohl’s post was shared, an Instagram user named @valeriegreyston posted a photo of a baby, reportedly named “Roxie Junie Grohl,” who the user claimed was Grohl’s love child.

However, a spokesperson for the former Nirvana drummer told TMZ it is fake.

The alleged close relationship between Grohl and porn website founder Annaliese Neilsen has also come under scrutiny, as fans make desperate attempts to identify the woman.

It’s not the rocker’s first time cheating, as he admitted to infidelity during his first marriage to Jennifer Leigh Youngblood. The couple was married for three years before splitting in 1999.

He then dated Louise Post of the band Veruca Salt, who accused him of cheating on her with actress Winona Ryder and a handful of other women.

In 2002, he appeared to confirm his status as a womanizer when he confirmed that he “did” groupies.

“Groupies come to the back,” he told The Face. “They know what they want; they know what the band wants. It just happens. It’s that easy.”