PGA Tour facing Justice Department anti-trust probe.

The Justice Department has opened a probe against the PGA Tour

To see if the tour violated any antitrust laws in relation to their face-off

With LIV Golf -- a Saudi-backed golf league.

The PGA Tour says the probe was not unexpected, and they are confident they'll be vindicated.

They didn't say what specifically the Justice Department was looking into.

The Wall Street Journal was first to report the probe, and the Justice Department is not commenting on the probe.

The LIV Golf league burst onto the scene last year as a potential rival to the PGA Tour,