The Welsh No 10 who landed eight penalties in the Heineken Cup Pool Four tie at St Helen's is optimistic about their chances against table toppers Castres and Alan Gaffney's men at Thomond Park.
"I think we can do Castres at home, then away against Munster anything could happen," the Welsh man said.
Harlequins could only muster a try by full-back Tom Williams in the second minute, converted by fly-half Jeremy Staunton. But then it was one way traffic. After Quins flanker Nick Easter was sin-binned for killing the ball, Henson kicked penalties in the 26th, 30th, 40th and 45th minutes to give his side a 12-7 half-time lead.
Staunton sailed wide with a penalty seven minutes after the break and after Henson did likewise with a drop-goal attempt, the visitors could only watch as the young Wales star then punished their every indiscretion.
N/S OSPREYS: Durston, Terblanche, Parker, Henson, S. Williams, M. Jones, Spice, D. Jones, B. Williams, A. Jones, Newman, Thomas, Bater, R. Jones, Pugh.
Neath-Sw'sea Ospreys scorers: Pens: Henson 8.
HARLEQUINS: Williams, Harder, Greenwood, James, Keogh, Staunton, So'oialo, Worsley, Fuga, Jones, Winters, Miall, Easter, Diprose, Vos.
Harlequins scorers: Tries: Williams. Cons: Staunton.
Ref: F Maciello (France).
Newcastle 34 Edinburgh 24
By Steve Douglas
NEWCASTLE left it late to make sure of victory in their Pool Five tie at Kingston Park.
The Falcons scored three tries in a frenetic eight-minute second-half spell to return to the summit of the group. Man-of-the-match Matt Burke was behind Newcastle's late rush for victory, but manager Rob Andrew was unhappy with his side's lackadaisical display, especially in the first half.
Edinburgh raced into a 9-0 lead with Chris Paterson hitting two penalties and Brendan Laney landing a drop goal before Newcastle closed the gap to three with a Dave Walder drop goal and a Burke penalty.
Newcastle moved into the lead when Burke put Jamie Noon in for the try and then converted from the touchline. But the Scots replied quickly with Todd Blackadder crashing in for a try which Paterson converted.
Paterson extended the lead (19-13) on the restart from a penalty before Michael Stephenson produced a super try and Burke's third conversion put Newcastle 27-19 ahead.
Burke clinched the bonus point with the try which he also converted the Falcons' third in eight minutes and that was game over despite Mike Blair's late injury-time effort.
NEWCASTLE: Burke, May, Noon, Mayerhofler, Stephenson, Walder, Charlton, Peel, Long, Ward, Gross, Buist, McCarthy, Charvis, Dowson. Replacements: Grindal for Charlton (55), Hurter for Ward (67), Grimes for Gross (55), Sititi for McCarthy (74).
EDINBURGH: Southwell, Paterson, Di Rollo, Dey, Joiner, Laney, Blair, Jacobsen, Hall, Smith, Pringle, Kellock, Blackadder, Callam, Hogg.
Replacements: Godman for Di Rollo (78), MacDougall for Dey (74), Dickinson for Jacobsen (74), Kelly for Hall (78).
Ref: Joel Jutge (France).
Glasgow 26 Llanelli 29
By Douglas Murray
GLASGOW coach Hugh Campbell accused his players of being their own worst enemies after a home defeat at Llanelli's hands turned their European dream into a nightmare.
A 29-26 loss left Glasgow rooted to the foot of Pool Three, reviving Llanelli's chances of advancing to the knockout stages but effectively killing Campbell's own hopes of seeing his side progress.
"Llanelli didn't beat us, it was our own failings that beat us in the end," said Campbell. We were robbed, but it was us who inflicted the damage by switching off in the second quarter."
GLASGOW: Kerr, MacLure, Craig, Henderson, S. Lamont, Howarth, Pinder, Tckachuk, Lawson, Murray, Hall, Turner, Mather, MacFadyen, Petrie.
Replacements: Logan for Craig (28), Parks for Howarth (65), Bulloch for Lawson (60), Beattie for Mather (60).
LLANELLI SCARLETS: G. Evans, Havili, Watkins, Finau, Selley, Bowen, Peel, John, Rees, J. Davies, Cooper, Wyatt, Easterby, G. Thomas, D. Jones.
Replacements: I. Thomas for John (65), Gravelle for Rees (65), Hodges for Easterby (68).
Ref: Roy Maybank (Kent).