But he suspects they may need more time to adjust from the Russian league, having both arrived from Anzhi.
"Eto'o's looked really sharp in training so far, and so has Willian," the England defender said.
"You speak to them and they talk about how the intensity of their training (in Russia) is a lot different to how it is here.
"So for sure it will take them a few weeks to get their full fitness, but once they do they'll both look very good."
For the big stories and the banter follow us on Twitter: @tribalfootball