"I still maintain the fact that I don't think they can last much longer because it's just not sustainable to ask human beings to do this and then go and perform at a high level." Lille moved top of their group after Canada striker Jonathan David scored his 12th goal of the season to seal a 1-0 win over Salzburg. Another sprint finish this year would raise doubts over the Ethiopian's ability to clinch the event for a second time but he reflected on the life-changing experience of triumphing over Kipchoge, who bounced back to defend his Olympic title in August. In other changes from the team which beat Japan 32-23 two weeks ago in Oita, Allan Alaalatoa returns to the front row, James O'Connor replaces the absent Quade Cooper at fly-half, and Andrew Kellaway returns at full-back after Reece Hodge was ruled out by a pectoral injury.