Sand started his Lanús career by being sent off on his league debut in a 5-3 defeat to Independiente. He then scored 10 goals in his next 9 league games. His good scoring record of 15 goals in 15 games in his first tournament with Lanús established himself as a favourite amongst the fans. In 2007, he was part of the squad that won the Apertura 2007 tournament, Lanús' first ever top flight league title. Sand became top scorer in the Primera División Argentina for the first time in the Apertura 2008 championship with 15 goals in 19 games. In Clausura 2009 he became the first player to become top scorer in consecutive tournaments since Diego Maradona in 1980. Overall, he scored 50 goals in 67 league matches and 6 in 12 Copa Libertadores matches.