Lewis Hamilton has “raised his level” in the last two seasons but still has weaknesses others are not exploiting, according to Fernando Alonso.
Alonso, who left F1 at the end of 2018 and is pondering a return in 2021, says it would be “nice” to test Hamilton.
The Spaniard told F1 Racing magazine: “He’s made a step forward – he is more competitive, more prepared.
“He still has some weak points that have not been stressed yet – no-one is pressing that button, that weakness.”
The two-time F1 champion said Hamilton’s superiority over his Mercedes team-mate Valtteri Bottas was obvious from the weekends when the car was not competitive.
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He added that Hamilton had not been tested under moments of extreme pressure in recent seasons.
“He’s raised the level the last couple of years, especially in 2019 when the car has not been as dominant as other seasons,” said Alonso, who tied on points with Hamilton when they were McLaren team-mates in a tumultuous 2007 season.
“If he cannot win, he’s a very close second – not 20 seconds further back, which is what happens a little bit with Valtteri.
“A weekend when the car is not as competitive, Bottas is fifth or sixth or a minute behind – but Lewis is not.