Lampard struck the winner from the penalty spot in Monday’s 2-1 win over Manchester City, which ended the Premier League leaders’ unbeaten start to the season.
But having been omitted from the starting line-up the 33-year-old, who was also left out of his side’s must-win Champions League fixture against Valencia last week, is seeking clarification regarding his future from his manager Andre Villas-Boas.
Mata, Chelsea’s headline summer signing from Valencia, however, believes it won’t be long before Lampard is back in the team.
“Lampard is a legend here, a legend who keeps on providing a lot of good to the club,” Mata said. “He is a great presence to have in the dressing room and, for me, he is a standard-bearer for the entire world of football.
“He still has a lot to give. He will score a lot of goals and play a lot of games this season, I’m sure.”