Scotland boss Craig Levein admits he is delighted with how much improvement the national team has made in recent times.
The Scots host Serbia in their opening 2014 World Cup qualifier this weekend and although Levein is well aware how dangerous his opponents are, he knows that his players are better equipped this time around than they were at the beginning of his tenure more than two years when they were trying to qualify for Euro2012.
"This is a tough, tough match," he said of the clash with Sinisa Mihajlovic's outfit.
"They have 16 players in the Champions League and a further six in the Europa League, so they are quality players.
"The fortunate thing for me is that our players have improved enormously and our team has improved enormously from where we were two years ago at the start of the previous qualifying campaign.
"I believe wholeheartedly in this group of players and I believe we have the best chance of qualifying for a long time."
Scotland take on the Serbs at Hampden Park on Saturday before they take on Macedonia, again in Glasgow, on Tuesday.