Blackadder said: "We have picked the best team available to us but it is also a reflection on a good collective performance last week. I feel this is a team that can go to Toulouse and win on Friday.
"There were positives to come out of that game last weekend - our defence was very good and we were strong in attack. It was frustrating because we have a team that is capable of beating the top sides in Europe but we'll go to Toulouse with the aim of asking some serious questions," he added.
Gunners team: 15 Hugo Southwell; 14 Chris Paterson Captain, 13 Marcus Di Rollo, 12 Peter Jorgensen, 11 Simon Webster; 10 Phil Godman, 9 Mike Blair; 1 Dave Hewett, 2 Dougie Hall, 3 Craig Smith; 4 Alasdair Strokosch, 5 Scott Murray; 6 Matt Mustchin, 8 Simon Taylor, 7 Allister Hogg
Substitutes:16 Andrew Kelly, 17 Allan Jacobsen, 18 Simon Cross, 19 Alan MacDonald, 20 Rory Lawson, 21 Matt Dey, 22 Francisco Leonelli