Lampard's Chelsea moved up to third in the league with victory on Saturday but they endured some nervy moments in the closing stages after Gerard Deulofeu converted an 80th-minute penalty for the hosts.
"But if we are overturning decisions because one referee somewhere else thinks it was more of a penalty than the referee on the pitch, then I think we are in a really dangerous place. You're going to be tossing a coin every week." Not a single penalty or red card was given by VAR in the opening nine rounds of the competition, but last weekend it made headlines by overturning five key decisions.