While leading players past and present on the WTA Tour have come out as gay, no male player competing at the sport's top level has done the same so far.
"I'm not sure if there are homosexual tennis players in the top 100," Fritz said in an interview published on Sunday. "Statistically speaking, there should be. ... I think it is odd, because I feel like a player would be accepted.
"Myself and my friends, other players on tour wouldn't have any issues with it, it would be totally normal and I think people would be accepting."
The 25-year-old world number nine said players may be reluctant to come out because of the attention that would come with it.
"I couldn't tell you why (no one has came out)," Fritz said.
"That would be a lot of big news and maybe people just don't want to be in the spotlight, maybe they don't want the distraction of getting all the attention and stuff like that."
Another reason may be that those players do not want to risk being on the receiving end of abusive language or being alienated by their peers.
An ATP Tour survey of players earlier this year found that 75% had reported having heard other players use homophobic slurs, leading the tour to partner with You Can Play, an organization committed to furthering LGBTQ+ inclusion in sports.
The survey also indicated a "strong fear of rejection, isolation from others on tour, and loneliness" as being likely barriers to LGBTQ+ players' publicly disclosing their sexuality to others.
It also found overwhelming support for ATP's taking action to combat homophobia.
