Current Celtic manager Neil Lennon is eagerly anticipating this year's Euro2016 qualifier between Scotland and the Republic of Ireland.
The Hoops boss counts on the duo for advice and has plenty of respect for the experienced pair who have won six Scottish league titles, four Scottish Cups and three Scottish League Cups between them.
Lennon spoke highly of both Strachan and O'Neill in the wake of the Euro qualifying draw which was held in Nice on Sunday.
"Martin had a huge influence on my career and I will always be indebted to him. In the last stages of my career, Gordon had a huge influence on me as well," he told the Daily Record.
"Both are different in their approaches but I have tremendous respect for them. They are brilliant men and managers.
"Martin knows the game and studies it. He is very mentally strong.
"I owe Gordon a lot as well. He was good enough to ask me to come back to Celtic.
"I was there for a year and a bit under him and I learned a lot from how he approached games and training.
"They're probably the only two men I can call for advice because they are the two who know better than anyone how to handle the job and what you are going to confront.
"They are always just a phone call away. They are pleased for me with the way things have gone.
"They should take something from it because they've had a huge influence on my career."
O'Neill managed the Hoops between 2000 and 2005 before Strachan took the Parkhead reigns from 2005 until 2009.
Lennon played under both men during his career, winning three league titles with O'Neill and two with Strachan, three Scottish Cups with O'Neill and one with Strachan and a Scottish League Cup apiece.
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