But Abraham has taken his chances this season, scoring in his last three appearances and displacing Giroud in the process.
Speaking ahead of Tuesday's clash with Rennes, Lampard said: "I'm really pleased with him. He's playing really well at the minute. His all-round game, off the ball work, link-up work, is good.
"It got slightly forgotten he was a massive plus for us in the first half of last season and was a big reason we finished fourth.
"The second half of last season was more difficult for him, that's normal for a developing player, and now I'm seeing a mirror of how he trains. He is training brilliantly; he is enthusiastic which is when Tammy is at his best. That is coming out in his game and I hope that continues.
"His next challenge is to remain consistent and if he looks at last season he will see that as well."