HIGHLIGHTS-Day two at the U.S. Open

Open tennis championships on Tuesday (all times GMT):

1627 IVANOVIC DUMPED OUT OF U.S. OPEN

Women's 29th seed Ana Ivanovic of Serbia lost 7-6(4) 6-1 to Denisa Allertova of Czech Republic in the first round.

1625 HALEP EASES INTO SECOND ROUND

Women's fifth seed Simona Halep of Romania lost just two games en route to a 6-0 6-2 win over Belgium's Kirsten Flipkens.

1613 NISHIKORI TAKES TWO-SET LEAD

Men's fifth seed Kei Nishikori looks to be heading into the second round after winning the second set 6-1 to take a two-set lead against Benjamin Becker of Germany.

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Relaxed Serena set to open quest for more history

Keys locks out Riske to end busy day for Americans

Djokovic advances but new concerns rise over fitness

Raonic confident he has learned from Wimbledon final defeat

Gasquet stunned by Britain's Edmund at U.S. Open

Miracle needed to reach Open final, says Muguruza

Energised Nadal completes straight-sets win in opener

In-form Cilic moving forward under Bjorkman's guidance

Vinci gives herself tough U.S. Open act to follow

Kerber cruises in opening win in pursuit of top ranking

1500 PLAY GETS UNDERWAY

Play gets underway on the main showcourts on a bright and sunny day at Flushing Meadows.

1500 MADISON KEYS, 21, ON FACING 16-YEAR-OLD KAYLA DAY, THE YOUNGEST PLAYER IN THE DRAW

"She was in the junior program at the USTA in Carson when I was there. I officially am starting to feel old because she was like the young group," Keys said after her 4-6 7-6(5) 6-2 win over Alison Riske in the opening round.

ORDER OF PLAY (PREFIX DENOTES SEEDING):

ARTHUR ASHE STADIUM (Play starts at 1500 GMT/11 AM ET)

Kirsten Flipkens (Belgium) v 5-Simona Halep (Romania)

Not before 1700 GMT/1 PM ET

Fernando Verdasco v 3-Stan Wawrinka (Switzerland)

Kateryna Kozlova (Ukraine) v 6-Venus Williams (U.S.)

Starting 2300 GMT/7 PM ET

1-Serena Williams (U.S.) v Ekaterina Makarova (Russia)

Lukas Rosol (Czech Republic) v 2-Andy Murray (Britain)

LOUIS ARMSTRONG STADIUM (Play starts at 1500 GMT/11 AM ET)

Denisa Allertova (Czech Republic) v 29-Ana Ivanovic (Serbia)

Janko Tipsarevic (Serbia) v 29-Sam Querrey (U.S.)

Juan Martin del Potro (Argentina) v Diego Schwartzman

(Argentina)

4-Agnieszka Radwanska (Poland) v Jessica Pegula (U.S.)

GRANDSTAND (Play starts at 1500 GMT/11 AM ET)

6-Kei Nishikori (Japan) v Benjamin Becker (Germany)

Katerina Siniakova (Czech Republic) v Eugenie Bouchard

(Canada)

Louisa Chirico (U.S.) v 17-Anastasia Pavlyuchenkova (Russia)

Not before 2130 GMT/5:30 PM ET

19-Steve Johnson (U.S.) v Evgeny Donskoy (Russia)