Define star.Sure, in 2010 Basso won the Giro and Nibali the Vuelta. But Sagan was only 19 at the time. He became a star at 22. In 2013 and 2014, the Liquigas weren't even in the top 15, despite having (one of) the best cyclists.
Sagan won 36 races between 2010 and 2012. And half of them were WT races.
He wasn't winning Classics yet, but he was already a very big name in cycling.