Ziyech went off with a hamstring injury during Chelsea’s win over Leeds United on Dec. 5 and the Blues have won only one of their five league games since then, losing three and drawing 1-1 on Monday with Aston Villa.
“I think with Hakim, the way he was playing, he was being very effective for us in terms of assists, goal creation, chance creation and some goals,” Lampard said.
“We were very fluid at the time. You’re going to miss players at that level when they drop out and we want him back.”
Lampard said he was hopeful that Ziyech might feature on Sunday if the game goes ahead – Manchester City’s game against Everton on Monday was called off due to new COVID-19 cases reported at City.
The Blues coach praised the passing of Callum Hudson-Odoi, another Chelsea winger, who made a rare start for the Blues on Monday after impressing as a second-half substitute in an otherwise dismal 3-1 defeat to Arsenal on Saturday.
“The obvious next part is the end product,” Lampard said, urging Hudson-Odoi to step up in terms of assists and scoring.
“When you look around at the numbers that the top wingers produced in the Premier League in recent years, Callum definitely has the capabilities and that will be the next stage for him,” he said.