May 15, 2019 UPDATED: May 15, 2019 08:56 IST World No. 5 Alexander Zverev has been struggling for consistency in the ongoing clay-court season (AP Photo) HIGHLIGHTS World no. 5 Alexander Zverev was stunned in straight sets by Matteo Berrettini Zverev has not got past the quarter-finals at any tournament since reaching the Acapulco final in early March Kyrgios displayed his best and worst as he combined spectacular shots with an outburst of poor behaviour
World number five Alexander Zverev continued his poor recent form as he crashed out of the Italian Open in the second round while Serena Williams had to pull out of the women's draw with a recurring knee injury on Tuesday.
Serena had beaten Swede Rebecca Peterson in straight sets on Monday and was due to face sister Venus but the injury means her participation at the May 26-June 9 French Open is in doubt.
Zverev, who has not got past the quarter-finals at any tournament since reaching the Acapulco final in early March, did little to suggest he could be a contender at Roland Garros after a 7-5 7-5 defeat by home favourite Matteo Berrettini.
Roared on by a partisan home crowd at the Foro Italico, Berrettini took the opening three games before the German, 2017 champion and last year's runner-up, regained his composure.
Berrettini then saved five break points to take a 6-5 lead before the rattled Zverev, who beat the Italian in the same round last year, threw away the opening set with two unforced errors and a double fault.
They traded breaks early in the second before Zverev, who saved a match point in the 10th game, committed another flurry of errors, capped by a forehand into the net that handed Berrettini a memorable win.
"The environment was great, the match that I played was horrendous," said the 22-year-old Zverev.
Second set meltdown for Nick Kyrgios
In first-round action, David Goffin produced two blistering sets to fight back and beat Stanislav Wawrinka 4-6 6-0 6-2 while Nick Kyrgios treated the crowd to an array of his antics in a 6-3 3-6 6-3 victory over Russian Daniil Medvedev.
The flamboyant and unpredictable Kyrgios again displayed his best and worst as he combined spectacular shots with an outburst of poor behaviour.
The Australian won the opening point of the match with what is fast becoming a trademark underarm serve and breezed through the first set before cheers from the crowd turned to jeers amid a second-set meltdown.
Having dropped serve to hand Medvedev a 5-3 lead, Kyrgios blasted a ball over the stands, then bent over and turned his backside to Medvedev and finally exchanged words with the umpire before the Russian held to force a third set.
As if nothing had happened, Kyrgios got back to business as he hammered in aces and winners, having also capped some good forays to the net with confident volleys to book a second-round clash with Norwegian Casper Ruud.
Goffin dropped the opening set before he blew Wawrinka away in the next two, the decisive moment coming in the second game of the third when the Belgian saved a double break point at 1-0 down.
He won the next five games and, although the Swiss briefly delayed the inevitable, Goffin was able to celebrate after his frustrated opponent blazed a forehand into the crowd.