Joe Root says there are “many more runs to come” after breaking England’s record.

Joe Root said there were “lots of runs still to be had” after overtaking Sir Alastair Cook to become England’s all-time leading Test run-scorer.

Root surpassed Cook's mark of 12,472 when he scored 71 on the third day of the first Test against Pakistan in Multan.

The 33-year-old went on and on, recording his 35th Test century and battling all day for his unbeaten 176, which took England to 492-3 and trailing by just 64 runs.

“I'm proud of course, but I still feel like there's still a lot to do,” said Root.

Root's tireless effort in the heat, coupled with 141 not out by Harry Brook, put England in a strong position in the series opener, despite Pakistan scoring 556 in their first innings.

Only once before have England conceded more runs in the first innings of a game and gone on to win, 130 years ago against Australia in 1894.

“I'm sure I'll look back on it when I'm done and be very proud of it, but I think what's special about it is the way we played as a team today,” said Root.

“We still have a chance to win the game, which is really exciting. Hopefully we can continue tomorrow.”

Root is playing his 147th Test, 12 years after his England debut in India.

By overtaking Cook, Root has moved up to fifth place in the all-time list of Test run-scorers across all nations, behind the game's greats Rahul Dravid, Jacques Kallis, Ricky Ponting and Sachin Tendulkar. Tendulkar tops the list with 15,921, just over 3,000 ahead of Root.