Scottish football: James Forrest, Bjorn Johnsen, Kenny Miller, diving

BBC commentator Rob Maclean continues a regular series of articles with his observations from the third weekend of the Scottish league season.

On-fire Forrest could fuel Scotland hopes

Rejuvenated James Forrest produced more compelling evidence at the weekend to suggest he is poised to be a big player this season for both Celtic and Scotland.

Those are dangerous words to utter because we've been talking for years about the promise and potential of Forrest and what we've had is flashes of brilliance and regular injury absences.

No-one's more frustrated than him that, at the age of 25, he hasn't played nearly enough football.

There's not much anyone can do about physical breakdown but there have been times, even when he's been fit, that Forrest hasn't appeared to have sufficient belief in his own considerable ability.

The appointment of Brendan Rodgers as Celtic manager looks like it could be the best thing that's happened to him. Forrest is torturing full-backs and making and taking goal-scoring chances.

That's great news for Celtic's chances in the Champions League. It could also give a big lift to Scotland's World Cup qualifying campaign. If skipper Scott Brown is back to a sustained spell of top form, his international retirement is a blow. A revitalised Forrest would be a major boost.

Silky Johnsen lifts Hearts with touch of Sow

If there's a touch of Osman Sow about latest Tynecastle recruit Bjorn Johnsen, the Hearts fans won't be complaining.

Bjorn in the USA - let me off with that one - to a Norwegian father, Johnsen is a tad taller than Swede Sow at 6ft 5in but the lanky look about him is strikingly similar.

Sow's 18-month stint with Hearts is fondly remembered. His height made him an obvious target man but it was with the ball at his feet that he did most damage.

One of Johnsen's first touches after coming off the bench for his debut against Inverness on Saturday was a clever back-heel to send Sam Nicholson on his way to hammering home the fourth goal in a comprehensive 5-1 win.

It was a promising little cameo performance from the far-travelled Johnsen, who's played in Norway, Spain, Portugal and Bulgaria.

Getting international clearance for him has been a tortuous process for Hearts but it could prove well worthwhile.

Diving back in the spotlight

The diving debate is gathering momentum with another couple of weekend 'offenders' in the Premiership seeing red at getting yellow.

Leigh Griffiths was booked for simulation after going down in the St Johnstone box

The highest-profile booking for alleged simulation was that of Celtic's Leigh Griffiths in Perth. I saw Inverness winger Jake Mulraney incurring a similar punishment at Tynecastle where, of course, a fortnight earlier Jamie Walker of Hearts picked up a two-match ban for conning referee John Beaton into awarding a penalty.

Whatever the case for the prosecution or defence in these particular incidents, I'm just glad diving is again under the spotlight.

Some players have become alarmingly adept at flying through the air with the greatest of ease without a hint of physical contact. It's a part of the game we could well do without.

Some bookings for diving will be right and some will be wrong but anything that persuades football's conmen to stay on their feet is fine by me.

Still Miller time at Rangers

New signing Joe Garner discovered at half-time on Saturday what a welcome from nearly 50,000 Rangers fans at Ibrox sounds like.

What the former Preston striker realised at full-time was that ousting veteran Kenny Miller from the central striking role is no shoo-in.

The former Scotland frontman will be 37 by the time Christmas comes but if he keeps scoring important goals, it's going to be difficult to leave him out.

Miller scored the stoppage-time winner against Motherwell after getting what proved to be the decisive goal at Dundee the previous Saturday.

Rangers haven't spent £1.5m on Garner to have him sitting on the sidelines but shunting Miller out of the attack is no foregone conclusion.

Lyon's sweet strike one to remember

We found out on Friday night what Darren Lyon's been building up to in his first 31 first-team appearances for Hamilton.

The 21-year-old full-back unleashed a ferocious 25-yarder into Dundee keeper Scott Bain's top corner to open his Accies account and give them an unexpected opening goal at Dens Park.

That was 13 minutes in and it was Hamilton's first venture anywhere near the opposition penalty box as Dundee dominated the opening exchanges.

The Dark Blues, despite equalising, faded dramatically out of the match to manager Paul Hartley's horror, and it was Accies who carved out the second-half chances which really should have won them the game.

Just the one goal for Hamilton but it was certainly memorable. If Lyon ever scores with a sweeter strike, I want to be there to see it.