Marin Cilic needed four set to beat Tennys Sandgren in the first round of the US Open. The former champion won in a set of 6-4 6-3 3-6 6-3 to book a second round ticket.
French no eight seed Jo-Wilfried Tsonga had a much easier ride over Marius Copil of Romania winning 6-3 6-3 6-4.
12th seeded Pablo Carreno of Spain beat Evan King of USA 6-3 6-2 7-6, South Africa’s Kevin Anderson beat another US qualifier Juan Cruz Aragone 6-3 6-3 6-1.
10th seed John Isner of America beat Pierre-Hugues Herbert of France in four sets 6-1 6-3 4-6 6-3 while Lucas Pouille won 6-3 6-4 6-4 over Ruben Bemelmans.
In a shocking defeat, Jack Stock of America lost to Australian qualifier Jordan Thompson 2-6 6-7 6-1 7-5 4-6. The 13th seed lost the first two sets but battled back to equal score before eventually losing 4-6 to the 75 ranked player.
In a similar case,21st seed David Ferrer of Spain lost to world number 102 Mikhail Aleksandrovich of Uzbekistan 4-6 6-3 6-2 6-1.
Alexander Zverev won in a straight set of 7-6 7-5 6-4 over American rapper Justin Busia also known as Don King.
There were wins for Kyle Edmund of Britain, Albert Ramos Viñolas and Diego Schwartzman of Argentina.
World Number one Rafael Nadal and Swiss Maestro Roger Federer will be in action today.