George Horne scored a hat-trick as Scotland ran in nine tries in a 61-0 bonus- point thrashing of Russia on Wednesday to set up a crunch Pool A showdown with host nation Japan for a place in the Rugby World Cup quarter-finals.
Horne scored his first two tries from halfback and added a third from the left-wing as Scotland finally got their high-octane running game going in their third match in Japan.
Five-eighth Adam Hastings, son of Scotland great Gavin, also made a significant contribution with the first two tries in four first-half minutes and eight conversions for a personal haul of 26 points.
Neither Horne nor Hastings are likely to start in Yokohama on Sunday when the Scots take on Japan almost certainly needing to record a victory and deprive the hosts of a bonus point to progress to the knockout stages.
That match in Yokohama, however, is in danger of being disrupted by Typhoon Hagibis, which is projected to strike the Tokyo area on Saturday, bringing strong winds and heavy rain.
Tournament rules state that any pool game that cannot be played is not rescheduled and instead is recorded as a 0-0 draw, with no bonus points available.
Scotland made 14 changes from the team that beat Samoa 34-0 and many of the players had a dual goal of winning the game as well as trying to force their way into consideration for Sunday's match.
Scotland's scoring in the first half came in an eight-minute burst with Hastings crossing twice, while Horne intercepted a flat pass by Dmitry Perov on his own tryline to give Scotland a 21-0 lead at the break.
Horne then secured the bonus point after a brilliant weaving run of more than 60 metres from Darcy Graham, who was the only player who also started against Samoa.
Russia then ran out of steam, and their defence faltered as they missed 41 tackles with hooker George Turner and winger Tommy Seymour crossing before Horne completed his hat-trick with more than 20 minutes remaining.
Match captain John Barclay brought up the half-century, just the 13th time Scotland have surpassed 50 points in tests, when he burst free with about five minutes remaining.
Scotland 61 (George Horne 3, Adam Hastings 2, John Barclay, Stuart McInally,Tommy Seymour, George Turner tries Hastings 8 cons)
Russia 0
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Reuters