The radio messages are becoming frantic from Isack hadjar. The Red Bull man thinks something might explode, but he's told by his engineer they are trying to help him out.

George Russell is right on his tail through the chicane but the streets are too tight to make a move.

Well, not just yet. Isack Hadjar is crying out for more power from his Red Bull but his car seems to be in trouble - and George Russell is inching closer and closer to Frenchman.

Red Bull receive a call from Isack Hadjar - the Frenchman is not happy with the performance of his car. Hadjar is now under pressure from the Mercedes of George Rusesell for fourth place. Are we actually going to see an overtake?

Engineer: "We need to cool the car and box this lap"

Andrew Benson
BBC F1 correspondent in Monaco

There are two ways of getting past someone in Monaco, pretty much like any grand prix but particularly crucial here because you can't overtake on track. You can either undercut someone. You can pit first and use the new tyres to gain time or you can pit after and use your tyres to gain time that way.

Cadillac's Valtteri Bottas has joined Max Verstappen on the retirement list. The Finn is out of this race after issues during the opening laps.

George Russell thinks Isack Hadjar could be there for the taking, so he and Mercedes are trying to work out the best way to move forward.

Max Verstappen talking to Sky Sports after his reitrement from the Monaco Grand Prix: "The formation lap wasn't going very well, after that the pre-start was terrible, there was no consistency and then the engine just dropped dead. I only got a little bit of power back after the first corner. Engine sounded really awful, couldn't go full throttle so we brought it back."

Russell: "Hadjar has front left graining, he won't be out here for much longer I think"

Inspector Russell has spotted some graining on Isack Hadjar's tyres. The Red Bull driver is in fourth, while Russell is one place higher than where he started in fifth.

Damon Hill
1996 world champion on BBC Radio 5 Live in Monaco

A bit of ebb and flow going on, I am not sure if Kimi is struggling to find his rhythm or whether Lewis has put a push on but Lewis is currently quicker than Antonelli.

If you look at Charles, he is about four seconds back from Lewis, it may be that they need a bit of clear air, keeps the tyres working. You want to go long here, so it may just be a tactical move and they are just watching the gap.

Liam Lawson is still in the points - he's actually gained a place with Max Verstappen's retirement - while Alex Albon is also set for a prize running in P10. Lando Norris, meanwhile, is still trying to catch the Alpine of Pierre Gasly for seventh.

The buffer Kimi Antonelli has over Lewis Hamilton is 3.2 seconds, so there's no panic for the youngster at the head of this race. Seven-time world champion Hamilton thinks his tyres are a little bit hot, though, as Antonelli clocks another fastest lap.

Hamilton: "There's a lot of degradation on these tyres, the rears are very hot"

Oliver Bearman is down in the dumps in P21. The Briton tells his Haas team his race is virtually over. Seems like he and team-mate Esteban Ocon came together on the opening lap. Frenchman Ocon is P15.

The front of the pack are clearing backmarkers quickly in Monte Carlo. Ferrari's Lewis Hamilton has picked up the pace slightly and has narrowed the gap to Kimi Antonelli to 3.7 seconds.

Damon Hill
1996 world champion on BBC Radio 5 Live in Monaco

It is a bit lacklustre for Haas, obviously a Ferrari-powered car but they've not been able to enjoy things, the competitiveness they've shown last year, but there's a lot of competition in Formula 1 and a lot of teams have brought upgrades and that gap continues to get bigger and bigger every time someone does that.

The medium compound is being treated with love and care by the frontrunners - the last thing you want is your race falling apart because of toasty tyres. Kimi Antonelli has clear air in front of him as he leads this Monaco race from pole, but he is a little bit slower than the previous laps.

Lando Norris can't find a solution to the Pierre Gasly problem just yet. The two navigate the technical Swimming Pool section but still the Alpine stays ahead of the McLaren.

Norris is eighth, Gasly is running in seventh.

Image source, Getty Images

Kimi Antonelli is already coming up to lap Valtteri Bottas from the lead of this race. The Italian is now 5.4 seconds clear of the Ferrari of Lewis Hamilton as he completes another lap of the Monaco Grand Prix. Charles Leclerc, in third place, is eight seconds adrift of the teenager.

Image source, Getty Images

Andrew Benson
BBC F1 correspondent in Monaco

At the moment, it is almost as if Kimi Antonelli is going stuff that, I am just going to go as far ahead as I can and I can make my pit stop whenever I want. I don't know if that is the case, it will be very unusual if it was but it certainly looks like it from his pace at the moment.