By ESPNSTAR.com staff
The Gunners edged out London rivals Tottenham for third place in the Premier League last season, but are five points behind Andre Villas-Boas' men this year.
With the likes of Spurs, Chelsea, Everton and West Brom also chasing a place in the Champions League in this campaign, Koscielny told Arsenal Player that the crusade to play in Europe's premier competition has become much tougher.
"It is very difficult, it is a race and I think there are five or six teams who can finish in the top four," he noted.
"Every game you [look out for] the other scores, but if you don't win your match then it is nothing to see these results. It is very important to get the three points every time and then look for the other scores afterwards."
Arsenal's next league fixture sees them take on defending champions Manchester City before playing Chelsea the following weekend. Expecting both sides to present stern tests, the Frenchman called on his team-mates to stay focused on their aim.
"Every weekend is difficult, it is a little war. It is very important to fight together until the finish," Koscielny said.
"Now we have a lot of very important games against teams who want to play in next season's Champions League so it is vital to stay focused on these matches and win."