Bon Jovi Tour Rolls On Without Richie Sambora

12-12-12 Sandy Relief Concert: Photos From Onstage & Backstage

Guitarist Richie Sambora and Jon Bon Jovi rock out during their set at the 12-12-12 Concert for Sandy Relief.

Bon Jovi is set to begin the European and South African legs of the band’s “Because We Can” tour on Tuesday, but the trek will continue without guitarist Richie Sambora.

Sambora took to his Twitter account on Friday afternoon to assure fans that he is doing fine, but is still dealing with "private" issues.

“Thanks 4 your notes & concerns. I'm doing f---ing great,” he tweeted. “This is a private matter but please know I love the band and you fans!”

Sambora dropped out of the band's North American tour due to "personal reasons" and, although rumors pointed to a monetary dispute as the core problem, singer Jon Bon Jovi insists that the New Jersey born axe-man is still a part of the band.

“All I can say honest to God is that it’s a personal matter, but we love him very much,” Bon Jovi said on the Ellen DeGeneres Show in April. “He’s absolutely still a member of the band."

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There is a silver lining for Bon Jovi fans. Matthew Bongiovi, brother of the lead singer, has been tweeting encouraging messages about the situation, and even made a prediction when a fan asked if Sambora will be on hand for the upcoming Rock in Rio show.

 “I feel Richie will be back this summer at some point,” wrote Bongiovi.

Bon Jovi is set to return to the United States in July, where a huge homecoming show at New Jersey's MetLife Stadium is scheduled for July 24 and 25.

Bon Jovi’s latest album, What About Now, debuted at No. 1 on the Billboard 200 albums chart when it was released in March.