Australia’s Robertson, who won this title ten years ago and was runner-up to Ronnie O’Sullivan last year, fired breaks of 102, 111, 54 and 57 in a fine display against veteran White, who did at least make a century of his own with a 102 in the second frame.
“I am pleased with the performance, I couldn’t ask for much more really,” said Robertson, who goes through to play Lee Walker in the last 64 on Wednesday. “Cardiff is a great venue, we had fantastic crowds for an opening day. It is one of the best events on the calendar.
“I have been showing good form in the last few events. The form is there, I am losing to the right kind of people, the players who go on to win tournaments. People are going to have to play well to beat me now. I am glad my game is back and I am looking forward to the rest of the season.”
Welsh prospect Jackson Page, a 15-year-old who won the world under-18 title last year, made a successful and dramatic first appearance at a pro tournament as he beat Jason Weston 4-3 on a respotted black. Read more on that story here.
Four-time Welsh Open winner John Higgins was the highest profile casualty on day one as he lost 4-2 to Sam Baird. World number 48 Baird knocked out the player 45 places above him and made a top break of 71.
Ryan Day lost the Ladbrokes World Grand Prix final against Barry Hawkins last night but managed to pick himself up and score a 4-3 win over David Gilbert.
Pontycymmer potter Day, who drove down from Preston this morning and arrived back in Wales just a few hours before his match, trailed Gilbert 2-0 and 3-2 but fought back to win the last two frames with runs of 100 and 63.
“I needed a few cups of coffee just to stay awake today,” said Day. “I was worried I might have felt flat tonight but a lot of people came to watch me so I had to put up a fight. I stuck in there at 2-0 down and stayed patient and I was delighted to win in the end.”
World number two Stuart Bingham compiled runs of 101, 59 and 64 in a 4-2 defeat of Welshman Matthew Stevens.
“Any win over Matthew is a good result,” said Bingham. “I started like a house on fire, made a nice 100 break which settled me down. Even though I missed a couple here and there, I always felt pretty comfortable out there.”
German Masters champion Anthony Hamilton kept his fine form going as he beat Luca Brecel 4-2 with a top break of 82.
Shaun Murphy top scored with 72 in a 4-0 whitewash of Jamie Curtis-Barrett.
Welsh cueman Dominic Dale saw off Zhang Anda 4-0 with a top break of 81 and said: “I have had a bad start to 2017 so I want to do well this week and get things rolling. Hopefully I can play a bit better now and relax a bit more.”