Smith today put down two tough catches and gave lives to centurions KL Rahul (110) and India skipper Virat Kohli (140 not out) as the visitors finished the third day at 342/5, still trailing by 230 runs.
"It was good overall but it was only the captain today wasn't it?" Lehmann said jokingly.
"But yes it was disappointing to not take those chances. They are tough chances, but you still have to take those on a wicket like this where we needed to speed the game up today. We need to take those chances and that's now two Tests in a row. There is still a lot of time in this game.
Rahul was given a life on 46 when Smith put him down off Shane Watson as he got distracted by the Spider-Cam running backwards. The opener went on to score 110 runs, his maiden Test ton.
Also Read
Smith later again dropped Kohli on 59 off Mitchell Starc and the Indian skipper went on to hit his fourth hundred of the series.
"It is great for the people at home and for entertainment throughout the day but we've just got to make sure it's positioned right more than anything else. On that particular occasion it was probably in the wrong spot," Lehmann opined.