and Maria Sharapova won in 2007.In 2005, whereas Roddick was upset in the first round against Gilles Müller at the Open, Clijsters became the first player to win both the US Open Series and the US Open, receiving $2.2 million, at the time the largest payday in women's sports. Clijsters defeated Frenchwoman Mary Pierce in straight sets: 6–3, 6–1. In 2010 she won $2.2 million again, this time $1.7 million for the US Open title and $500,000 in bonus for second place in the US Open Series. In 2007, Federer became the first male player and the second player overall to win the US Open Series and go on to win the US Open, winning $1.4 million plus the US Open Series bonus of $1 million, bringing his prize winning total to $2.4 million. This topped Clijsters' $2.2 million as the biggest US Open payday to date. In 2013, Serena Williams and Rafael Nadal both won the US Open after also winning the US Open Series. Due to several considerable prize money increments over the years, Serena Williams and Rafael Nadal surpassed Roger Federer's Us Open series payday record by winning $3.6 million each, and they shared the record for the largest prize money paycheck in tennis history for a single tennis tournament. In 2014, Serena Williams would repeat her previous year performance in winning both the US Open Series and the US Open. She now stands alone in the record for the biggest payday in tennis history, with a total amount of $4 million. Starting from 2017, the US Open Series will not feature a Bonus Challenge. Series tournaments Tournaments In 2021, the US Open Series comprises the following tournaments: Points distribution 2008–2016 2006–2007 2004–2005 Past tournament winners Men Women Series standings + performance at the US Open Note: From 2006 on, only players who earned points in at least two US Open Series events are eligible for the final (Top 3) standings. 1 – Hewitt and Davenport finished first in 2004 final standings based on more match wins in US Open Series events. 2 – Nadal finished third in 2005 (over Roger Federer) based on more set wins in US Open Series events. 3 – Schnyder was placed third in 2007 because Justine Henin (who had more points – 100 for winning Toronto) only played one tournament and was therefore not eligible for the top three positions. 4