GRAEME MORRISON has warned Scotland that they will face the most severe physical battle of their three-game Australasia tour when they play Samoa at Apia Park tomorrow.

The Glasgow centre starred for the Scots in their last meeting with the South Sea Islanders, when they defeated Samoa 19-16 thanks to Ruaridh Jackson's last-minute penalty at a snow-wreathed Pittodrie in November 2010.

With soaring temperatures down under Morrison is expecting a completely different game from the last encounter between the two sides but is confident the Scots can claim a win which would preserve their unbeaten tour record after back-to-back victories over Australia and Fiji.

Morrison said: "I have no doubt that the Samoans will really test Scotland's defensive resolve tomorrow.

"The conditions are completely different from those we experienced back in 2010, I expect them to run at us every chance they get.

"They are hugely powerful ball carriers and we will need to put the shackles on them at source as much as we can. On top of that the Samoans are a very proud rugby nation and with this being on their turf in front of their fans I think they will up the ante, physically speaking, a notch at least from the Pittodrie game.

"But the boys will take to the field with a lot of confidence and determination to get a victory that would hopefully put us back in the top 10 of the IRB world rankings."

Head coach Andy Robinson has gone for a powerful line up with Sean Lamont restored to the starting side in order to test the solid Samoan defence with his strong running.

Although admitting his disappointment at failing to make the party, Morrison is keen to see his young Warriors team-mate Rob Harley gain his first cap off the bench.

He said: "I had a lengthy chat with Andy Robinson when he announced the touring party and the fact I was not going.

"Although I was disappointed for a day, for me I think the benefit of almost a month off to rest the body has been the best thing.

"Last summer I had the preparation for the Rugby World Cup and I think physically there was a hangover from that during the season.

"But for young Rob I really hope he gets his first cap against the Samoans.

"He has been in and around the Scotland squad for a year now and if he doesn't come on against Samoa he will eventually get that cap. But if he does I am sure Glasgow will benefit from it in the new season."