A pair of unexpected home losses may ultimately cost Chelsea a chance at silverware, but they are still in the running for the Premier League title.
They are also a major factor in the relegation battle.
With two matches left in the season, the Blues have a chance to move atop the Premier League on Sunday by beating Norwich City, and potentially putting the Canaries on the precipice of relegation.
Chelsea (24-6-6) enter the weekend second in the league, two points behind Liverpool in first and one ahead of third-place Manchester City, who have played one fewer match and visit Everton on Saturday.
A victory over Norwich would vault the Blues into the Premier League lead, but the Reds face Crystal Palace away on Monday.
Chelsea put themselves back into the race after last weekend's 2-0 victory at Anfield. However, their hopes of winning their first Premier League title since 2010 may ultimately be spoiled by a shocking 2-1 defeat to Sunderland on April 19, their first loss at Stamford Bridge in 78 matches under manager Jose Mourinho.
To make matters worse, Chelsea lost at the Bridge again on Wednesday, falling 3-1 to Atletico Madrid as they were ousted in the semifinals of Champions League after playing out a scoreless draw in Spain a week earlier.
"It's difficult to think about what we could have done differently," midfielder Andre Schurrle told the team's official website after the Blues squandered a lead a minute before half Wednesday. "We need to analyse what we could have done better, bounce back in the league and try to win our last two matches."
Facing a pair of teams trying to stave off relegation may help.
After hosting Norwich (8-8-20), the Blues conclude the season against Cardiff City next weekend.
The Canaries may be tied with Sunderland for 17th place, but they're 12 behind on goal difference. They also face Arsenal on the final match day after visiting Stamford Bridge.
Chelsea have outscored Norwich 8-2 while winning three straight meetings, including a 3-1 victory at Carrow Road on Oct. 6, when Oscar, Eden Hazard and Willian scored.
Hazard, Frank Lampard, Fernando Torres and Branislav Ivanovic tallied in a 4-1 win in the most recent match with Norwich at Stamford Bridge on Oct. 6, 2012.
Norwich City enter this visit on a five-match losing streak, during which they've been outscored 12-2. They've also lost eight straight away matches, culminating in a 4-0 defeat at Manchester United last weekend.
"We needed to be better. We needed to cause them more problems," manager Neil Adams told the team's official website. "You talk about character, that's absolutely what we need now."
Norwich also need goals, as they've been shut out in four of their past five games.
Gary Hooper had a goal for the first time in 17 matches in a 3-2 loss to Liverpool on April 20, but he followed that by failing to even muster a shot in 21 minutes off the bench versus United.
Robert Snodgrass wasn't much better, getting only one shot on target last weekend after scoring versus Liverpool.