Scott McDonald reflected on his career thus far in an interview on BBC Radio Scotland; here is Part 2. About scoring the winner in an Old Firm match against Rangers: "As far as I'm concerned, apart from winning the championship last year, that's been the biggest moment for me in my career at Celtic thus far and it was probably my best goal and the most important as well.
"The goal against Man United (in the Champions League group stage) was up there as well but I'd have to say the goal against Rangers (was better) because there is such a rivalry there and going to their patch on a big occasion where if we can get three points there we go even further ahead.
"I know it's not the case at the moment; we are only two points again so it makes for another great occasion in a fortnight but there has been that many great moments in my career thus far, hopefully they keep coming."
On the goals he scored against Celtic when he was at Motherwell to hand the title to Rangers despite supporting the club: "When I was at Motherwell I had lost that (support) with Celtic for a while because I was playing against them a lot so I got to a couple of Champions League games but obviously after that incident I never showed my face again.
"At Motherwell you played and trained with teammates 320 days of the year. They are your mates and the guys you work with day in day out and you trust and you get on the park on you work your guts off for so you are not going to do anyone else any favours but them."
On being the fourth all-time leading scorer in the Scottish Premier League on 76 goals and sitting just 12 goals behind John Hartson who is third: "That's something I've not looked at; usually strikers always look at that; you ask a striker how many goals he has scored and they will always know but I never knew that was the case.
On his most difficult opponent: "It can be hard at times when you do play against your old teammates because they do know you inside out because you train with them every day so that can be difficult.
"There's been that many, in the Champions League it's a massive occasion, you can go through the lot. You could say (Alessandro) Nesta, (Carlos) Puyol. (Gabriel) Milito was good as well I must say because he kept annoying me and the whole game I just wanted to give him one especially at Celtic Park because he kept nicking in front of me and with the way I play it's usually get your back in there but he wouldn't let me do it. He just kept nicking the ball off me and obviously I'm getting a rollicking on the touchline from the manager as well and I was shaking my head and didn't know what to do him, he may it pretty tough and the most disappointing thing is I didn't get to go at him again because he never played in the second game because he was suspended."
On qualifying for the 2010 World Cup with Australia: "That is a major goal of mine. I've done a lot of things in my career already which is amazing, a lot of it has come in the last couple of years but to go to a World Cup now that I'm playing at the highest level is a big opportunity.
"I went through a barren spell and because of that case I was overlooked so ever since that day I've been wanting to put that right so now I see myself in a great position where I am part of the Socceroos, (I've been) involved in every (qualifying) game so far so hopefully that can be the case in the lead up.
"It would be nice to go and stake a claim and maybe get a winner in Japan."
On being eligible to represent Scotland: "It happened twice (considering it). Bertie Vogts, when he was in charge and Maurice Malpas was with the U21s at that time.
"I was asked to play for the U21s but it was a massive decision for me. I always said to them if it was going to be the case (playing for Scotland) it would have to be a full cap because I couldn't commit otherwise and they hummed and the hawed about it and then Walter Smith came back again. At that time it was even more a tough decision to say yes or no because I was getting frustrated not being involved with the Socceroos at the time and I felt maybe it was my time to get an opportunity.
"Looking back at it now and the players that we have had in the past I was wrong to think that because the amount I've learnt in the last couple of years has shown me why these players are playing at that top level."
McDonald steps out for the Socceroos in tonight's World Cup qualifier against Japan in Yokohama.