Robbie Keane is convinced he can still score goals for the Republic of Ireland if he is used in the right way.
Keane, who took his senior international tally to 65 with a hat-trick against Euro 2016 minnows Gibraltar last month, was left kicking his heels on the bench by manager Martin O'Neill until 12 minutes from the end of his side's 1-0 defeat in Scotland on Friday night.
Keane insisted he respected the manager's decision to leave him out - it was the first competitive game he had missed for his country when fit for 13 years - and field Shane Long as a lone striker with support from Jon Walters.
However, the LA Galaxy frontman, who has been released back to Los Angeles and won't be involved against the USA, hinted that if O'Neill wanted to persist with that system, it is not one to which he is best suited.
Keane said: "If the manager wants to play with one up front, I'm not f***ing Niall Quinn or I'm not Shane Long - they are better at that than I am. If you play two up front and you want to score goals, that's my game.
"Listen, I'd prefer to speak about the team rather than an individual, making a big deal out of someone else starting the game.
"The manager made a decision and you have to respect that. Playing one up front doesn't suit me, I think that's fairly obvious. I'm 5' 10", so it's not my game."
Keane's personal anguish was exacerbated by a result which dented the Republic's qualification hopes and at the same time, boosted Scotland's chances of competing with them, world champions Germany and current Group D leaders Poland for the two automatic spots.
In truth, it was a game suited not to touch and flair players, but to those blessed with brawn and spirit, and Shaun Maloney's decisive curling finish was a moment of rare quality on a night when the passion generated by a raucous crowd was transmitted on to the pitch.
It had been billed as an Old Firm-type clash and Keane, who played in two of those high-octane affairs during his loan spell at Celtic in 2010, admitted that was exactly how it turned out.
He said: "Yes, it was, it was exactly the same as the Old Firm derby I played in when I came up here. No quality, just people trying to kick each other and stuff like that.
"The whole atmosphere, the build-up to the game - certainly, there wasn't much quality out there, both teams trying to play.
"It was a scrappy affair and we knew that whoever was going to get the first goal was probably going to win the game, and that was the case."
Victory was sealed 15 minutes from time by Maloney's inch-perfect curled finish, although Ireland very nearly snatched a point at the death, just as they had done in Germany last month, when Scotland defender Grant Hanley glanced substitute Robbie Brady's injury-time free-kick on to his own crossbar.
Keane said: "When you come away from home, the most important thing is if you don't win the game, you don't lose it. Unfortunately, we did."
For all the despondency within the Irish camp after their first defeat of the campaign, there was a realisation too that there is a long way to go before the final standings are confirmed.
Four of Ireland's next five games will take place at the Aviva Stadium, the next of them in March against the Poles, who are now three points clear of the Republic, the Scots and the Germans on 10.
Keane and his team-mates now have four months to mull over the opening skirmishes in the battle to make it to France, and while disappointed at the result in Glasgow, the 34-year-old, a veteran of the 2002 World Cup and Euro 2012 finals, knows there will be further twists and turns along the way.
Keane said: "Listen, by no means is this over. We can't get too down on ourselves.
"We are disappointed, of course we are, but overall if you look at the bigger picture, if you look at the points that we have, people probably expected us to have that around this point.
"But when you go away to Germany and get a point, you expect to come here and certainly get something out of the game. But we didn't."
Darron Gibson picked up a minor knee knock last night and has returned to Everton.
It was the biggest decision any Irish manager has made since Saipan. To drop your captain, your talisman, your chief goal threat for a game of this nature was a massive call by Martin O'Neill.
The great, green vault of Celtic Park was, as promised, transformed into the taut bearpit that drew Irish blood. It was the night Gordon Strachan had prophesised, a gathering of Scottish clans keyed to almost unhinged emotion as they claimed critical Group D momentum.