Barcelona and Manchester United have clinched late home Champions League wins against Celtic and Portuguese side Braga respectively.
Barcelona's last gasp 2-1 win over the Scottish champion and United's 3-2 victory over Braga, which saw the English giant become only the second side to come back from a 2-0 deficit twice and win - the other being Arsenal - sees both sides needing just a point to seal a place in the knockout stages.
Holder Chelsea, though, is going to have to battle hard to reach that stage after it came away 2-1 loser to an impressive Shakhtar Donetsk at its fortress in Ukraine.
Shakhtar tops that group on seven points while Chelsea's loss was slightly offset as Juventus had to come from behind to draw 1-1 in Copenhagen against Danish minnow Nordsjaelland.
Celtic had taken the lead through an own goal by Javier Mascherano - completing a wretched few days for the Argentinian who was sent off at the weekend - but a superb goal at the end of the first-half by Andres Iniesta levelled matters.
Despite a splendid rearguard action throughout the second half Celtic succumbed to a goal by Jordi Alba - his first at the Nou Camp - in the fourth minute of time added on as Barca recorded its 100th win in Champions League competition.
Victory also saw Barcelona break its club record for an unbeaten run at home extending the present one to 18, with its last defeat coming against Rubin Kazan in October 2009.
"I think that our win was deserved," said Alba, who moved to Barcelona from Valencia.
"The strength of this (Barcelona) team, is that it resists till the end.
"A match lasts for 90 minutes and that is the length of time that Barca spends trying to score."
Lennon said he couldn't be prouder of his side and relished the chance of a second go at Barcelona in Glasgow in a fortnight.
"They were brave and stuck with what I asked them to do," he said.
"They defended brilliantly and at times we looked dangerous on the counter-attack. Everybody had written us off but I knew of the quality of the character in the team. I look forward to doing it again in a couple of weeks."
Despite Celtic's performance it only has a one point advantage over Spartak Moscow, which grabbed its first win of the campaign after two defeats with a 2-1 home win over Benfica.
United had to rely on a brace from the outstanding Javi Hernandez and a messy one from Jonny Evans to storm back and take the three points after its fragile defence, which saw Rio Ferdinand rested, had conceded two early goals to Alan.
UEFA Champions League