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The Norwegian has been in red-hot form for Borussia Dortmund, scoring 33 goals in 31 appearances this season.
He's also been doing the business in the Champions League, where he became the quickest player to reach 20 goals in the Europe's premier club competition.
He did it in 14 games, considerably faster than Messi and Ronaldo - who took 40 and 56 games respectively.
But asked about the Messi and Ronaldo comparisons, Haaland feels he still has a long to way to go.
"I think only of myself, to improve my game every day," Haaland told Dagbladet.
"I don't need to talk about Messi and Ronaldo, probably the best players in history. I still need a lot to reach them."
This season, Messi has scored four more goals than Haaland, while Ronaldo has hit 30 - three less than Haaland in all competition.
The 20-year-old has even been tipped to "outscore" both Messi and Ronaldo if he continues to find the net at the staggering rate he is currently.
Journalist Raphael Honigstein told talkSPORT: "He's only played 30 months at this level, and he's only going to get better. If you put him in a better team... I don't know where this could stop.
"The stats are crazy, if he continues scoring at the same level he will outscore both Ronaldo and Messi, which seems absolutely crazy to contemplate, but he could do it!"
While Haaland isn't focusing on being mentioned in the same conversation as the two greats, recently Thierry Henry likened him to former Manchester United striker Ruud van Nistelrooy, a long-time rival of his when it came to the Premier League Golden Boot.
"He doesn't care about anything else other than the goal," said Henry of Haaland.
"He doesn't care, other players will go onto the wing, he wants to stay in the frame of the net, in between the two posts. He knows he's lethal there."
"He is so powerful, by the way, if you look at him, you think: 'Oh, trouble.' The way he finishes is just ridiculous. He believes so much in himself - I like that - there's a bit of cockiness about him, you've got to be a bit cocky, you've got to look and people and think you can score.
"Yes [he's like Van Nistelrooy]... They want to kill, they want to be in the box, they're looking at the defender and thinking: 'You're not going to be able to live with me.'
"I can see sometimes when the midfielder doesn't give him the ball, that look you sometimes give your midfielder, like: 'Are you going to give me the ball? I want to score now, I want to be the guy who's going to make the team win.' I can see that with him."
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