NEW YORK — The US Open leapfrogged Wimbledon as the richest grand slam event in tennis as the United States Tennis Association announced Tuesday a 10.5 percent prize money increase for next month's championship. The purse for the US Open will hit $42.3 million, with the men's and women's singles winners each pocketing $3.3 million. The All England Club upped the Wimbledon prize money this year by seven percent to 26.75 million pounds ($41.82m). Singles winners Novak Djokovic and Serena Williams each received 1.88 million pounds, just under $3m at the current exchange rate. For 2015, the singles remuneration for each round will increase by at least 10 percent. All 128 singles entrants are guaranteed $39,500, with prize money almost doubling with each victory. The payout for the doubles competition will increase by 8.4 percent overall, with the men's and women's doubles champions earning $570,000. —Reuters