Shevchenko, 32, scored nine league goals in 47 appearances in two seasons at Stamford Bridge after moving from AC Milan for a £30 million fee.
He is now back on loan with Milan but has only started two Serie A games this season and scored two goals - one in the Coppa Italia and the other in the UEFA Cup.
However, Shevchenko is looking for a milestone 40th goal for Ukraine in his 86th international on Wednesday.
Lampard also said Saturday's 4-0 friendly win over Slovakia, in which he scored England's third goal, was the perfect warm-up.
"Slovakia's technical style is similar to Ukraine but I am sure Ukraine will be stronger. They will come here to get points and there will certainly be an edge to their play."