Iceland became the smallest country to advance to the FIFA World Cup finals.
The stage was set for Gylfi Sigurdsson in the second half to impress manager Ronald Koeman but few would have expected what followed next.
Iceland played dominant football to register their first win against the Dutch side in 11 meetings.
Mario Mandzukic and Darijo Srna gave Croatia a 2-0 win in their play-off second leg tie against Iceland.
Spurs' reward was a home tie with West Ham United in the quarter-finals, while Manchester City will travel to second-tier Leicester City.
Torres played a key role in Chelsea's second-half revival, but having earlier appeared to scratch Jan Vertonghen in an off-the-ball incident, he was sent off in the 81st minute after being shown a second yellow card for leading with his arm in a challenge on the same player.
Eriksen, making his first appearance since his move from Ajax, played a part in both goals during Spurs' 2-0 victory over Norwich.
The Denmark international set up Sigurdsson's opener in the first half before having a hand in his team-mate doubling the lead after the break.
Gareth Bale was absent from the Tottenham squad for a pre-season friendly against Espanyol, but manager Andre Villas-Boas was able to hand debuts to both Soldado and Brazil midfielder Paulinho.
The result will also complicate Benitez's preparations for next week's Europa League final against Benfica, but it did allow Spurs manager Andre Villas-Boas to depart with a smile after his first game back at Stamford Bridge since he was sacked by Chelsea last year.
Spurs went into the game aiming to tighten their grip on third place and they took the lead after just 34 seconds when a stretching Emmanuel Adebayor toed Jan Vertonghen's cross past Tim Howard.
Bale, who has been in superb form this season, clutched his leg in agony after being stepped on by David Degen in stoppage-time of Thursday's 2-2 draw against FC Basel in the Europa League quarter-final first leg.
Gareth Bale, Gylfi Sigurdsson and Jan Vertonghen were all on target in a one-sided Europa League last-16, first leg win at White Hart Lane which left the Italians with a mountain to climb in the return next week. Chelsea had slumped to a 1-0 loss at Steaua Bucharest while Newcastle carved out a 0-0 draw against Anzhi Makhachkala.
Bale had given Spurs a first half lead but an Andy Carroll penalty and Joe Cole's strike put West Ham ahead by the hour mark.
Tottenham completed the signing of Hoffenheim midfielder Gylfi Sigurdsson on Wednesday, one day after the appointment of new Spurs manager Andre Villas-Boas.
Swansea City made sure of their place in the Premier League for next season and sent Blackburn a step closer to the drop with a 3-0 victory at the Liberty Stadium.