The pair have scored 10 goals in the nine games they have played together since Sturridge signed from Chelsea at the start of 2013.
The England man told Liverpoolfc.com: "It was from the first couple of training sessions. When you play with somebody, you can know what they're going to do. We've never really spoken about it.
"We spoke when I first signed about positional things - that was the first time we played with each other.
"But since then, I just think we both understand each other and the way the other plays.
"It's not just myself and Luis, it's Stevie G behind us."