Greg Rusedski bid a muted goodbye to Canadian tennis fans with a 6-4, 6-2 loss to Russian Mikhail Youzhny.
Five of the eight seeds had already been beaten in first round action this week.
They were beaten by Frederic Niemeyer of Canada and Glenn Weiner of the US in the first round at Wimbledon.
Roger Federer beat Russian Mikhail Youzhny at the Dubai Open on Saturday.
Russian fourth seed Mikhail Youzhny made a winning start to the New Year as he routed world no. 2 Rafael Nadal 6-0, 6-1 in the final of the Chennai Open on Sunday.
Haas had earlier defeated Russia's Mikhail Youzhny with an identical 6-4, 6-3 score.
World number one Novak Djokovic survived a second set fightback from Slovak Martin Klizan before winning his opening match at the Miami Open 6-0, 5-7, 6-1.
"It happened to me but I will not tell you where or how," Arnaud Clement told reporters after his first-round defeat by Russia's Mikhail Youzhny at the Paris Masters Series tournament.
The fourth seeds got a walkover after their opponents Rainer Schuettler of Germany and Mikhail Youzhny of Russia did not turn up.
Igor Andreev took Russia to their second successive Davis Cup final by beating Philipp Kohlschreiber in the fifth and deciding rubber.
Roger Federer claimed a 6-3 6-1 victory over a shell-shocked Andre Agassi on Saturday to reach the final of the Dubai Open.
The Indo-Australian pair got the better of Rainer Schuettler and Mikhail Youzhny 4-6, 6-4, 6-2 in the second round of Dubai Open.
Both scored straight-set victories in Friday's semi-finals.
The Indo-Czech pair beat second seeds Mark Knowels and Daniel Nestor in the semi-finals.
Marat Safin and Mikhail won the doubles to give Russia a 3-0 lead in their Davis Cup World Group playoff tie.
Substitute Dmitry Tursunov beat Andy Roddick in an epic five-set battle to seal a Russian victory over the United States.
A shoulder muscle pull forced Rikl to retire from the first round match at the Mercedes Open.
Bob and Mike Bryan beat Mikhail Youzhny and Dmitry Tursunov in the doubles to enable the United States pull back 1-2 in their Davis Cup semi-final against Russia.
The Indo-Czech pair beat Leos Friedl of the Czech Republic and Mikhail Youzhny of Russia in the quarter-finals at the US Open.
Fourth seed Rafael Nadal showed he is healthy and ready to challenge for a third US Open title as he rolled into the last 16 at Flushing Meadows on Friday with a fist-pumping 6-1, 6-4, 6-2 win over Russian Andrey Kuznetsov.
The Argentine joined third seed Rainer Schuettler, fifth seed Mark Philippoussis and sixth seed Tim Henman as a first round loser.
The Russian hinted at retirement after rallying to beat Nicolas Kiefer in the first round action at the St Petersburg Open.
Ivan Ljubicic salvaged the opening day of Croatia's Davis Cup semi-final against Russia, winning a pulsating five-set duel with Mikhail Youzhny to level the tie 1-1.
Spanish teenager Rafael Nadal upset Russian 15th seed Mikhail Youzhny in a dramatic second-round battle.
A relieved Rafael Nadal felt the confidence come flooding back in a first-round romp at the Australian Open on Monday.
World No. 3 David Ferrer has reached the semi-finals of the Valencia Open for the fourth consecutive year with a 6-4, 4-6, 6-0 win over fifth seed Jerzy Janowicz.
Here are some facts about Federer and his ranking.
Rafael Nadal, with his troublesome left wrist improving every day, will be eyeing more progress at the US Open on Friday when he bids for a place in the last 16.
News of all that's transpired on and off the tennis courts
Nadal fought from two sets down to defeat Medvedev in a five-set thriller at Rod Laver Arena.
Federer looked more relieved than overjoyed when Tiafoe's forehand found the net on match point to keep his hopes of a 20th grand slam title alive.
India's Rohan Bopanna and his Romanian partner Florin Mergea began their campaign at the Wimbledon championships with a hard-fought win over over Tim Smyczek and Jiri Vesley in the men's doubles.
Stanislas Wawrinka survived a thriller against Mikhail Youzhny in the second round of the Rogers Cup on Tuesday, fighting back in both sets to prevail 7-6(3), 7-6(8).
Five-time champion Roger Federer brushed aside Lukas Rosol on Thursday to set up a mouthwatering semi-final clash with Novak Djokovic in the Dubai Championship.
Millman, ranked 80 places above world number 14 Pouille, needed 73 minutes to clinch a 6-3, 6-4 victory and the best win of his career by ranking position.