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Porsche continues to lead the 2014 Le Mans 24 Hours after four hours of action, with the top three cars currently circulating on the lead lap.

With each of the top three pitting during that hour, the #20 Porsche remains in front, though it has still completed one less stop than its main rivals, the #7 Toyota and the #2 Audi.

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Brendon Hartley replaced Timo Bernhard in the car during the #20 Porsche's last stop and is now circulating 10secs ahead of Stephane Sarrazin in the Toyota and 53secs ahead of Benoit Treluyer in the Audi, though the both are beginning to close the gap.

Conditions are now sunny and dry following the earlier downpours that eliminated the crashed #3 Audi and delayed the heavily damaged #8 Toyota.

The LMP2 class remains closely contested, with the top two of Michel Frey in the Race Performance Oreca and Alex Brundle in the OAK Ligier split by just a second at one stage before pitting, releasing the Signatech Alpine of Paul-Loup Chatin into the lead.

Meanwhile, Corvette's Tom Milner has passed Porsche's Jorg Bergmesiter for the GTE Pro lead too, while Aston Martin leads GTE Pro.

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Live text commentary recap of Hour 4: Key moments in bold

17:56 (UK Time)
Good effort by Rebellion - Prost has just set the #12 car's fastest lap of the race and it is still running a comfortable fifth having hit no issues so far. Decent performance for a car that only had its first proper run last month

17:54
Timing screen glitch there... showed the Porsche as having pitted, but it is still out front. Gap down to 15secs though as Sarrazin picks up the pace

17:49
The top three are lapping at a similar pace at the moment, #20 Porsche leading by around 20secs, with the #2 Audi 53secs back

17:36
Not for long! Corvette blasts into the lead of LM GTE Pro

17:36
Little help for a brother? Bergmeister gets baulked by a fellow Porsche driver but does just enough to keep the Corvette behind... for the time being

17:35
The GTE Pro battle between Porsche and Corvette evokes plenty of memories of years gone by, the two fierce rivals often locked in battle... good to see the new and very sexy C7 R on the pace

17:34
You'd think we are in a sprint race given how close the LMP2 and GTE Pro classes are at the moment! Corvette's Milner is all over the back of Bergmeister's Porsche and Brundle isn't done with Frey yet either

17:32
Patrick Long is driving the leading Porsche in LM GTE Am at the moment... good news for fans of Patrick Dempsey, the only driver here to have a bodyguard following him around

17:32
Frey is back in front in LMP2 as well

17:31
There isn't much in it for the GTE Pro lead though as Corvette's Tom Milner chases down Jorg Bergmeister in the Porsche

17:31
Great race for Porsche at the moment! They lead LMP1, GTE Pro AND GTE Am

17:30
Doesn't look like it. Hartley in the Porsche is the fastest driver on track at the moment and he duly sweeps into a good lead

17:29
The #7 Toyota is back in the pit lane again... can it keep the lead?

17:28
By the way, it was Brundle that prevailed and has taken the new Ligier JS chassis into the lead

17:28
Big battle in LMP2 - the OAK Ligier of Alex Brundle and the Race Performance Oreca of Michel Frey are disputing the lead of the class... I would say they are door-to-door but only one of them actually has a door

17:27
Interestingly, given Audi was expected to play itself into this race with superior fuel economy, its two remaining cars have stopped more than the leading Toyota and Porsche

17:26
And just as I say that, the #2 Audi is in the pit lane for its fourth stop

17:25
The gap at the front continues to come down - Treluyer is lapping around two secs a lap faster than countryman Sarrazin in front of him, while Hartley is 22secs further behind

17:24
The other car involved in that clash - the Murphy Zytek - is still in the pits being repaired

17:24
Six cars have now retired from this race - the GTE Pro #71 AF Corse Ferrari of Rigon/Kaffer/Beretta and the Greaves Zytek of Munemann/Latif/Winslow have joined the sidelines, the latter retiring after that crash during the second rainstorm

17:22
Also, the #8 Toyota is circulating in 43rd overall but will need a small miracle if it is to get back into a victory challenge

17:21
Creeping up the order slowly after its earlier technical issue, the #14 Porsche is now running 16th overall and Neel Jani has just pitted to hand over to Marc Lieb

17:20
Incidentally, Treluyer is flying in the #2 Audi and has gotten the gap down to the leader to under a minute now having been 1min 10secs behind

17:19
Brendon Hartley is now in the #20 Porsche, but has come out behind the #2 Audi again

17:18
The #60 AF Corse Ferrari being driven by Lorenzo Case is also in the gravel trap at Indianapolis. Replays show he ran wide at the preceding corner, got onto the wet run-off and simply slid into the gravel trap at the next left-hander

17:17
The #20 Porsche comes into the pit lane for its third stop, releasing the #7 Toyota of Sarrazin back into the lead

17:14
The LMP2-leading Race Performance Oreca is in the pit lane for its fourth stop. It's an impressive race showing by the Swiss outfit given it barely features in practice and qualifying... for the time being, the Signatech Alpine has taken the lead now

17:11
Further down the order, Aston Martin is having a mixed day - the #97 car is only fifth in the GTE Pro class, but the #98 Vantage has just taken the lead in the GTE Am class

17:10
The #33 Ligier is on its way again

17:09
That #20 Porsche is showing decent fuel economy as Timo Bernhard continues to lead, with Wurz five seconds behind in the #7 Toyota

17:08
Shame for the all-Chinese line-up as they were running inside the top five at the time in the new closed-roof coupe

17:07
Adderly Fong's OAK Racing Ligier is into the gravel trap at Indianapolis