Arsenal and Tottenham Hotspur sit just two points behind the leading pack, too, and Robertson expects the race to involve several teams throughout the campaign.
Liverpool were tipped as the main contenders for defending champions City in the build up to the campaign and have lived up to the billing so far. They have been on a great run.
"They did well, as did we, up until the penalty moment".
He twice waved away penalty appeals from City, as well as overlooking some strong challenges from Pep Guardiola's side, before eventually awarding the visitors a spot-kick late on.
Algeria worldwide Mahrez blazed the resulting spot-kick over, but City will still go into the global break on top of the Premier League table. "The attacking threat from their team is brilliant and I think we stopped that, defended well as a team and kept them to as few chances as we could".
"We grafted for 90 minutes to stay compact and we are happy to get the draw".
"I then watched the game last Saturday against Liverpool where I thought they were at full pelt to stay in that game". They probably controlled it a bit more in the second half and had a bit more composure when we were rushing it.
The win put the Blues one point ahead of the north-western pair prior to their own clash on Sunday at Anfield, having played one more game. Unfortunately, the deadlock wasn't broken.
"We can play a lot better but on days when you are not at your best it is important not to drop points".
The Reds extended a remarkable run of not conceding a Premier League goal at Anfield - which stretches back to February and now totals 841 minutes of football. They also dropped deeper as a back four to deny Liverpool's front three the space to get in behind them and it worked a treat. It is so hard to defend so I am really happy how we did it. "We've had some hard games but we will continue".
"As a unit, it's all of us". "How we played was different to previous seasons".