HEINEKEN CUP POOL THREE
Venue: Monigo Stadium Date: Saturday, 13 December Kick-off: 1335 GMT
Coverage: Live commentary on BBC Radio Wales and online, watch live on Sky Sports 2 interactive and live score updates on BBC Sport website
Wales centre Gavin Henson is now on paternity leave
Gavin Henson has been ruled out of the Ospreys' match in Treviso because partner Charlotte Church is due to give birth to their second child.
The Wales centre had been set to strengthen the Ospreys back-line in the Heineken Cup clash on Saturday.
The 26-year-old centre had been named in a 23-man Ospreys squad after recovering from an Achilles problem.
Captain Ryan Jones is still out with a foot sprain, with prop Paul James leading the side at the Monigo Stadium.
Singer Church and Henson became parents for the first time in September 2007 when Ruby Megan Henson was born.
The pair had become a couple during Wales' 2005 Grand Slam.
Church and Henson became an item during Wales' 2005 Grand Slam
Since then Henson's career has gone through highs and lows and he has struggled for form this season after a spate of injuries.
Henson was absent when the Ospreys romped to a record 10-try 68-8 win over the Italians last week after being forced out of Wales' November Tests with an Achilles problem.
Henson's absence leaves the south-west Wales region without a number of key players.
Back-row forward Ryan Jones heads the Ospreys' lengthy sick list and missed the bonus-point victory against Treviso at the Liberty Stadium with an inflammatory problem in his right foot picked up on Wales duty this autumn.
The Ospreys are also without four injured Wales stars; scrum-half Mike Phillips, prop Duncan Jones, hooker Huw Bennett and lock Ian Evans.
Scrum-half Jamie Nutbrown is out as he has failed to recover from a chest injury while Ben Lewis, Gareth Owen and Jon Spratt are also missing.
The Ospreys, quarter-finalists in last year's Heineken Cup, have won their last two Pool Three games and lie in second place with 10 points, four points behind leaders Leicester Tigers and five points ahead of Perpignan.
The Welsh region hope to extend Treviso's European losing streak at the Monigo Stadium to 11 games to boost Sean Holley's team's last-eight chances.
Treviso: Brendan Williams; Andrew Vilk, Benjamin De Jager, Fraser Waters, Marius Goosen; Andrea Marcato, Tobias Botes; Franco Sbaraglini, Giorgio Intoppa, Pedro di Santo, Antonio Pavanello, Cornelius Van Zyl, Mark Gilbride, Dion Kingi, Hottie Louw.
Replacements: Diego Vidal, Enrico Ceccato, Enrico Pavanello, Michael, Barbieri, Marco Filippucci, Michael Horak, Alberto Lucchese.
Ospreys: Lee Byrne; Tommy Bowe, Sonny Parker, Andrew Bishop, Shane Williams; James Hook, Rhodri Wells; Paul James (capt), Richard Hibbard, Adam Jones, Ian Gough, Alun Wyn Jones, Jonathan Thomas, Filo Tiatia, Marty Holah.
Replacements: Ed Shervington, Cai Griffiths, Tom Smith, Steve Tandy, Rhys Webb, Dan Biggar, Jonny Vaughton.