second-half goals by mohamed yattara and alexandre lacazette helped olympique lyonnais go top of ligue 1 with a 2-0 home win against bastia on wednesday .
substitute yattara opened the scoring in the 77th minute and ligue 1 top scorer lacazette took his tally to 25 eight minutes later to move lyon up to 64 points from 32 games .
alexandre lacazette and mohamed yattara were both on the score sheet as lyon beat bastia .