Ange Postecoglou noted the significance of Georgios Giakoumakis' first Celtic goal in his first start as the Hoops beat St Johnstone 2-0 in the Premiership at Parkhead.
The win moved Celtic within a point of the Scottish Premiership summit on Saturday after Hearts could only draw at home to Dundee.
The Edinburgh club head Rangers and Dundee United - who beat Motherwell 2-1 - on goal difference, with Celtic fourth.
Rangers can regain the lead with a result at St Mirren on Sunday.
In the 35th minute of his fourth appearance signing from Dutch side VVV-Venlo in August, Giakoumakis converted an Anthony Ralston pass to make the breakthrough.
With 10 minutes remaining, returning full-back Josip Juranovic added a second with a penalty.
Postecoglou said: "You know what strikers are like, there's no striker in the world that doesn't feel good unless he is scoring goals, particularly when you come to a new club and a new environment.
"For me, whether he scored or not wasn't going to be as important. I think he did what we needed to today.
"But I know for him, getting that goal is going to be pleasing and hopefully he can build from there.
"You can never be overloaded with options but it's great to see we have those options in attack now.
The Australian was pleased with the patience his side showed.
He added: "I knew it was going to be a difficult game, one where we were not going to get a helluva lot of space, particularly in and around their box.
"We had to be disciplined and patient with our football and I felt we did that.
"There weren't many times we got frustrated or over-played things - we stayed calm and composed.
"Also we were clinical when we did get the chance. That was key, we took our chance really well.
"It was good to get the second goal and we could probably have had a couple more in the end."
At Tynecastle Hearts hit the woodwork before and after John Souttar scored in the 37th minute, but were pegged back by a late goal from Jason Cummings.
Charlie Mulgrew scored a 77th-minute winner for Dundee United at Tannadice after Ryan Edwards' goal had been cancelled out Tony Watt's penalty.
In the day's other matches Aberdeen beat Hibernian 1-0 and Livingston won 3-2 at bottom club Ross County.
Australian Associated Press