After Trent Alexander-Arnold had dispatched a strike into the top corner from a set-piece routine at Stamford Bridge, the Reds went two goals in front when another pre-arranged move at a dead-ball situation saw Robertson cross for Roberto Firmino to head in.
Chelsea tested the visitors’ resolve in the second half but Liverpool held out and chalked up a 15th consecutive Premier League victory – in large part due to their free-kick preparations.
“We’ve worked on them,” said Robertson after the clash in the capital.
“The first one was probably a bit less work done on it, I think Trent said he wanted a touch and a hit but the other one we’ve been practising on and luckily it has come off.