Suarez nearly capped the win with a spectacular chip from 40 yards, with the ball just sailing wide of the left-hand post, but Rakitic added gloss to the scoreline three minutes from time with a firm header from Dembele's corner.
Messi quickly quashed any chance of Celta springing an upset.
Gerard Moreno then smacked the post as Espanyol continued to threaten on the break but he added a second before the break when Tono failed to clear by booting the ball against his goalkeeper allowing Moreno to score.
Messi then turned provider, lobbing a ideal pass behind Celta's back line to meet the run by Alba, who chipped Alvarez to score.
With Messi having re-signed until 2021, Alba said he hoped the 30-year-old could maintain his incredible form.
From Air India To Partially Foreign Owned Airline?
Overseas investment policy has also been liberalised in case of power exchanges, an online platform where electricity is traded. The government is in the process of finalising the modalities for strategic disinvestment of debt-laden Air India.
Canada Unveils Veteran Hockey Team for PyeongChang
Worldwide data analytics company Gracenote predicted gold for Canada in men's hockey as part of a 33-medal haul in Pyeongchang . Former IceCaps forwards Eric O'Dell and Christian Thomas along with goaltender Ben Scrivens have been added to the roster.
"They look for each other and are happy to do so, because it is not just Alba assisting Messi".
Not content with their 2-0 lead, Barca continued to push forward, with Suarez seeing a goal harshly ruled out for offside before Andres Iniesta was denied by Sergio's fingertips after a fine Messi backheel.
And his call paid off in an 18-minute first-half blitz that saw Messi net twice before Jordi Alba and Luis Suarez got in on the act.
Celta Vigo faced Barcelona at Nou Camp at the Spanish League and they managed to end the game with a 2-2 draw.
Barca join Real Madrid, Atletico Madrid and Valencia in the draw for the quarterfinal, which will take place on Friday.
SC: Not mandatory to play National Anthem before a Movie
Supreme Court has stated that playing of the national anthem - " Jana Gana Mana " at movie halls is not mandatory. The new decision, Indian news outlets reported, allows theatres to choose whether to play the national anthem.
'Mixed' Performance For Marks & Spencer In Q3
Tesco shares fell around 4 per cent today morning despite the supermarket announcing record sales over Christmas period. Their signature luxury products are being undercut by bargain supermarkets at a fraction of the price.
Facebook to shut down its virtual assistant 'M'
The Mark Zuckerberg-led firm had built M for its Messenger chat platform in an attempt to rival Apple's Siri and Google Assistant. Facebook is shutting down its Messenger virtual assistant, M, which helps users make dinner reservations or get gift suggestions.
Marvel Studios taps writer to pen long-awaited Black Widow film
There's more great news because The Wrap reports that Jac Schaeffer is set to write a script for a Black Widow standalone movie. Fans were calling for a Black Widow spin-off for a long time and the project has finally gained momentum with the latest news.
All you need to know about India's 100th satellite
Liftoff of the four-stage PSLV, boosted by six strap-on solid-fueled rocket motors, is scheduled for 0358 GMT Friday (10:58 p.m. In this context, ISRO has taken four-month interval to revisit some of the core areas.