The 'Temple' Patch on Gill's Forehead: Cricket's Law Book Still Has a Blank Page for Wearables

Eden Park, Auckland. Rain shortened the match, India won by five wickets. The image that travelled furthest on television was not the scoreboard — it was a small patch stuck to Shubman Gill's forehead. Above the non-striker's crease, just below the hairline, a thin, faintly reflective strip on the forehead of India's ODI captain. A few overs later New Zealand seamer Kyle Jamieson walked over and asked him what it was.

That question became the match's biggest question. It is also the question no umpire answered, no match referee answered, and no broadcast graphic answered. In twenty years of watching this game, I have seen cricket do this repeatedly: curiosity gets written first, the regulation gets written last.

Start with what is known. The device is called 'Temple'. It was created by Deepinder Goyal, co-founder of Zomato. Its sensor — described in reports as 'Brainflow' — reads changes in blood flow through skin contact, and from that derives an 'entropy' estimate of stress and energy. Badminton's PV Sindhu has worn it before, including at the World Championships. Sindhu told NDTV that it works differently for every person.

Now what is not known. Gill has not said a single public word about it. There is no confirmation whether it forms part of India's official fitness-monitoring programme. Whether DLS was applied, what the revised target was, how many runs Gill made — none of that is in the reports either. A five-wicket margin in a rain-shortened chase can be a comfortable cruise or a mid-innings stumble. Without the target, that number cannot be weighted.

So this is not a match report. It is a device report, and the match is merely its vehicle.

The real subject here is not the device but its status. Cricket's law book begins by settling who is permitted on the field and what they may carry. The Laws divide player equipment into three baskets — bat, ball, protective gear. ICC playing conditions add another layer: a strict prohibition on communication devices. The reason is plain. A message reaching a player from outside the ground is the oldest door in the match-fixing world. But 'Temple' is not a walkie-talkie. It is described as physiological monitoring, not messaging.

That is the crack the entire case sits inside — the rules ban communication, not measurement.

I watched every frame of the Auckland footage available to me, repeatedly. What shows: the patch on the forehead in non-striker close-ups, beneath the helmet, visible even outside the crease. What does not show: whether the device transmits or merely logs, whether any connection is live or offline, and most importantly whether that data leaves the ground at all.

Let me pause here. The broadcast feed can tell me the device existed. It cannot tell me what it was doing. The distance between those two statements is the entire argument. A camera does not travel inside a sensor, and forty re-watches do not close the gap. What the footage proves is narrow: a new piece of equipment was on the field during play and nobody stopped it.

Now walk the chain of authority, because that is where this will be settled. At the bottom, the on-field umpires. Their job is to inspect equipment under the unfair-play Law and the playing conditions. They recorded no objection, so at their level the matter closed. Above them, the match referee, who could have entered something in the report. At the top, ICC equipment regulation and the board's compliance arm. Not one line was written at any level. How would it be? You cannot fill in an action form for a thing that has no name in the law.

This is the part general coverage skips. The media asked "what is it?" and stopped there. Nobody asked who authorised it, or whether any agreement exists between the captain and a company receiving free global advertising from his forehead.

The clause economy lives exactly here. Cricket has a disclosure framework for endorsements, but it applies to activities outside the field. There is no transparency mechanism for equipment worn in a live international. Imagine a brand placing its mark on a helmet tomorrow — would an umpire remove it? Probably yes. So why was the forehead patch not removed? Because the patch reads as protection, not as advertising. The letter of the law is easy; the spirit of the law is where careers get decided.

Now the part nobody is angry about — and that is the problem. Jamieson's curiosity, Sindhu's usage, the broadcast close-up: all of it generates interest, not controversy. Interest feels pleasant, so it stays in the conversation. But interest routinely buries governance. By the time this becomes a controversy, no rule will have been written.

The second trap, and cricket media falls into it every time: confusing cause with correlation. India won, Gill wore a device, therefore the device won the match? Absolutely not. Nothing in the reporting claims the device improves performance. The benefits described are informational — understanding how the body responded, how recovery looked. Information and performance run on separate tracks. Sindhu's use is no proof of benefit for Gill either; that is precisely why she said it varies person to person.

The third point, and the least examined: whose data is it? This device captures cerebral blood-flow and stress data. Where that data goes, how long it is retained, whether it travels straight to a company server or stays with the player — none of it was asked. An athlete's biological data is not public property the way a match is, yet in cricket nobody has defined its owner. And remember, this is a device reading blood flow in the brain. If a radio were ever added to that patch, the question would migrate from equipment to player integrity — and then the ICC would have to answer. Law tends to be written after the crisis, not before.

Three things are worth watching over the coming months. One — whether Gill explains it himself and states a purpose. Two — whether the board or the ICC issues any clarification on wearables, especially if other players adopt it. Three — whether any company-player agreement becomes public.

The moment cricket's administrators have to write down which equipment is green and which is red, cricket will have filled one more blank page. The question is not what Gill wore. The question is who permitted it — and why the page that permits it is still blank today.