Lavillenie opened with four successful vaults in four attempts .
Lavillenie looked well in control up to 5.98 m and sat atop the leaderboard having vaulted one centimetre higher than the gold - medal mark he achieved in London in 2012 .
Opening with four successful vaults in four attempts , Lavillenie looked well in control up to 5.98 m and sat atop the leaderboard having vaulted one centimetre higher than the gold - medal mark he achieved in London in 2012 .