Andy Roddick has once again been praising Jannik Sinner, seeing to detail the outstanding qualities of the 22-year-old boasts.
Across the last 18 months, it is startling how far the youngster has come, from an emerging starlet, who had admittedly challenged without threatening to become an unstoppable force that seemingly nobody can beat at the moment.

Novak Djokovic, Daniil Medvedev, Andrey Rublev, Alex De Minaur and more have all fallen to the wayside this season in an effort to topple him.
And now, Roddick has sought to explain what has made him so suddenly proficient.
Andy Roddick praises Jannik Sinner for key change
Speaking to the Tennis Channel just yesterday, Roddick once again sought to laud Sinner just moments after he had been left stunned by the manner in which he had brushed aside his latest opponent.
The Italian categorically destroyed Sebastian Korda in similar fashion to how he dispatched with Daniil Medvedev in Miami.
And the 41-year-old sought to attribute this newfound unrelenting success to a mid-season change made last season.
Roddick noted: ‘The guts to change service motion, to the step up as opposed to the platform mid-season last year, that takes some guts and they deserve some credit for that for the way it has worked out.
‘He’s not getting broken, he can beat you off both sides, it almost feels like he has more shape on his shots but hasn’t lost any of the margin. If he starts throwing in these ridiculous drop shotters, and the way he’s moving, the hard court movement translates to clay, this is scary. This is scary stuff.’
Can anybody stop Jannik Sinner?
The short answer to that query, going by current form, is no.
After all, only one man has in Carlos Alcaraz, and even he seems doomed to endure a campaign laden with injuries, having already had to pull out of a few tournaments due to various ailments.
So, that leaves Sinner alone at the top, having already beaten many of those aforementioned who would seek to challenge him for elite honours.
Given his recent demolition of Korda too, he shows no signs of slowing down on clay either.

So, whilst one person might be able to match his stamina, they will not quite have his hitting power.
Another might be able to go blow for blow, but would instead lack the requisite quality to hold serve throughout an entire three-set match.
Sinner can do it all, and that’s what makes him so dangerous and so unstoppable.
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