Boris Becker thinks Alexander Zverev has been lacking "the killer instinct" for the past couple of months and that's one of the reasons behind his inconsistent play.

PARIS — Jannik Sinner passed his first test back on tour after a doping ban — a run to last weekend’s final at the Italian Open , where his tennis felt good and looked good, and the statistics he studied afterward backed that up.

SportsLine tennis expert Blake Von Hagen reveals his top French Open longshots for the men's and women's draws

The plane was forced to turn around and make an emergency stop in Hamburg, leading Zverev to land in Paris hours later than expected.

Bookmakers and most insiders are convinced that Jannik Sinner starts as an underdog compared to Carlos Alcaraz at Roland Garros – the second Major tournament of the season – which will start on Sunday 25 May in Paris.

With less than 10 days to go until Roland Garros begins, Alexander Zverev and Jannik Sinner have taken different approaches to prepare for the tournament.

Alexander Zverev will be third seed for the French Open but the 28-year-old German's prospects of winning his first Grand Slam title in Paris are not looking especially bright.

Tennis great Rafael Nadal believes that Germany's Alexander Zverev has so far lacked the mental strength to win a Grand Slam title. "Unfortunately, I think it's about his head.