The FC Barcelona team bus left Lionel Messi at Anfield on Tuesday because the player took too long to pee. Barça was defeated in the Champions League semifinal, and nobody seemed as dejected as Messi. The forward cut a forlorn figure, hurried through the mixed zone without speaking to the media, and had to submit a random urine test. But the Barcelona delegation left Messi there because it had a flight to catch, Business Insider was told. A vehicle and an escort remained with Messi, and he was shuttled to the airport before everybody jetted back to Spain together. Visit Business Insider's home page for more stories. The FC Barcelona team bus left Lionel Messi at Anfield after a crushing 4-0 defeat by Liverpool FC on Tuesday night because the player was taking too long to pee during a random doping test. Barça had a 3-0 advantage from the first leg in Spain last week but was powerless to prevent a resurgent Reds team after two goals each from Divock Origi and Georginio Wijnaldum settled the match for Liverpool, which now advances to the Champions League final on June 1. Though Messi was ranked as Barcelona's best player according to WhoScored.com data, having attempted five shots and supplied three chances for his teammates, the team was unable to score what could have been a critical goal and left the pitch dejected and empty-handed. Read more: Liverpool FC mounts stunning, 4-goal comeback to dump Lionel Messi and FC Barcelona out of the Champions League for good, advancing to the final Messi cut a forlorn figure, hurried through the mixed zone without speaking to the media, and was called on for a random drug test, a source with knowledge of the situation confirmed to Business Insider. Watch Messi shun the press below: Spanish and British tabloids reported that the Barcelona team bus left Messi at Anfield, with various reports indicating that this was because he had to do a urine test. The reason, Business Insider was told, was that Messi was taking too long to pee. Barcelona still arranged for a car to wait for Messi, and he joined the squad before the club jetted back to Spain together. Read more: Some of the biggest stars in soccer are saying Lionel Messi is so good that he can no longer be compared to Cristiano Ronaldo "There are some players from each team that are picked at random by the doping control after matches in the Champions League," the source said. "They take names at random, and they're the ones that have to submit to the doping control. One of the players was Messi," the source added. The source said that "the team, the officials, managers, players" wait for the player but that "at a certain point, the delegation prefers everyone leaves to go to the airport, as the team, coaches, everyone has to go through the procedures at the airport with boarding passes." Georginio Wijnaldum scored two against Barcelona on Tuesday. Photo by Rich Linley - CameraSport via Getty Images Business Insider was told that in the cases where a player is left, an escort and a "special vehicle" are arranged to shuttle the player to the airport once he has passed the doping control. "This is something that happens very, very, very often," the source said. "Not all players can pass the doping control at the same time. Some players submit a sample of urine quickly; some players take more time. The quick players pass the doping control, go with the rest of the team to the airport. "If a player takes more time, then the team waits to a certain point, but the delegation thinks it's better for everybody to start the procedures at the airport. "That is very usual, and yesterday that was the case for Messi. If it was any other player, it would have been the same. [Clément] Lenglet, [Gerard] Piqué ... the decision would have been the same. We wait for the player at the airport, he takes the car, goes to the airport, and he joins the rest of the team, and everybody flies back to the city — and that is the story. It is as simple as this." Barcelona won the La Liga championship last month but has two league matches left: a game against Getafe at Camp Nou on Sunday before a trip to Eibar the following Saturday. It has a chance to win another competition at the end of the month when it takes on Valencia in the Copa del Rey final on May 25.<doc-sep>The video will auto-play soon 8 Cancel Get the latest football news in your inbox every weekend for FREE by signing up to our email bulletin Invalid Email Something went wrong, please try again later. Sign me up! Thank you for subscribing We have more newsletters Show me See our privacy notice Lionel Messi wasn't on the Barcelona team bus that headed for the airport following defeat by Liverpool in the Champions League on Tuesday night. Instead, the Argentina international was left at Anfield while the rest of his team-mates headed back to Spain without him. The reason for Messi being left behind is that the five-time Ballon d'Or winner was required to provide anti-doping testers with a sample. The process took longer than anticipated and Barcelona chiefs made the decision to leave without their talisman. The 31-year-old would later head to the airport where he was greeted by Barcelona fans; some of whom were angry with the shock result and made their voices heard. (Image: Twitter) Barcelona were expected to reach this season's Champions League final after beating Liverpool 3-0 at the Nou Camp in the first leg of the semis. But they were battered 4-0 at Anfield and crashed out of the competition. Messi didn't speak to members of the press after the game, and was filmed by fans at the airport before he flew back to Spain. A video showed the Argentine flanked by security guards as he was accosted by some supporters. (Image: Getty) Other Barcelona fans, meanwhile, showed their appreciation for Messi. Although Messi didn't speak to the media following Barcelona's defeat, his team-mate Sergio Busquets did. The midfielder said: "They have been better than us. I apologise. (Image: Getty Images) "After what happened in Rome, this happened again. It's tough to go out like this after the first-leg result. "Liverpool have been smarter than us, they were faster. I think we had chances to score the goal we needed, but it wasn't meant to be today."<doc-sep>
Barcelona's team bus left Anfield without Lionel Messi, according to reports in Spain. But all was not as it seems, as Messi was held behind by anti-doping testers and made alternative arrangements to catch up with his team-mates. According to Spanish TV channel El Chiringuito, the Barcelona bus left for the airport whilst Messi was still at Anfield waiting to provide testers with a sample. After a miserable evening on Merseyside, Barcelona were in no mood to hang around, even for their Argentine superstar. Messi refused speak to the press after his side were stunned by Liverpool at Anfield, declining the chance to explain their latest Champions League failure in the mixed zone. (Image: Getty Images) Whereas team-mates Luis Suarez and Sergio Busquets were amongst those to speak to reporters, Messi was shepherded through to the dressing room after a miserable evening. Messi's first leg magic looked set to have put the Catalan club into the final, but he was unable to have the same impact as they were stunned in the second leg and thrashed 4-0. It is the second straight year the Nou Camp giants have let a three goal advantage slip in the knockout stages of the competition having been turned over by Roma at the quarter-final stage last season. There are now serious concerns that Messi, 31, may struggle in his quest to add a fifth Champions League winners' medal to his collection. (Image: Clive Brunskill) Busquets apologised on behalf of the team for their defeat, stating: "They have been better than us. I apologise. "After what happened in Rome, this happened again. It’s tough to go out like this after the first-leg result. "Liverpool have been smarter than us, they were faster. I think we had chances to score the goal we needed, but it wasn’t meant to be today."