Frank Lampard felt his young Chelsea side passed another stern test as they beat Crystal Palace 2-0.
Second-half goals from Tammy Abraham and Christian Pulisic secured a sixth straight Premier League win for the Blues and lifted them, temporarily at least, up to second.
They endured a frustrating first half against an obdurate, well-drilled Palace side but found a way through after the break with Abraham's 10th goal of the season and Pulisic's fifth in three games.
"Every game in the Premier League is hard, particularly against a team as organised as Palace," said Lampard.
"In the first half we started well, then allowed our tempo to drop, but when we came out in the second half with the intent that we did, we won the game relatively comfortably - a nice, solid win with a clean sheet.
"We've had teams come here and be difficult to break down, it's a test of not only how you unlock the door, but can you switch on to make sure you don't get hit by the sucker punch?
"I was really delighted with the game management in a game like today. I got as much joy out of Kurt Zouma and Fikayo Tomori's performances in defence, and the midfielders shielding in front of them, as I did our attacking play."
Six minutes after the interval Abraham broke the deadlock. Mateo Kovacic was the architect, brushing off a couple of challenges in a congested midfield before finding Willian with a clever reverse pass.
The Brazilian's neat flick on the edge of the box teed up Abraham, who strode forward and confidently buried his shot past Vicente Guaita.
