They extended their advantage to a high of 51 seconds .
They were always within range as the sprinters ' teams lined up to lead their men out at the finish , Sagan and Liquigas just having the final say .
They extended their advantage to a high of 51 seconds but they were always within range as the sprinters ' teams lined up to lead their men out at the finish , Sagan and Liquigas just having the final say .