Hideki Matsuyama leads the BMW PGA Championship by one shot at the halfway stage after firing two extraordinary eagles in his second-round 64, but he has a world-class chasing pack waiting to pounce over the weekend.
The tournament debutant found himself four shots off the lead at the conclusion of the weather-affected first round on Friday morning but soon set about closing the gap when he teed off in the afternoon.
The Major Champion turned in 31 after making an eagle and two birdies on the front nine before a run of three gains in four holes after the turn catapulted him up the leaderboard.
Matsuyama bogeyed the 15th following an errant tee-shot but bounced back in style with a chip-in eagle on the 17th to take the outright lead on 12 under par.
European Ryder Cup stars Justin Rose, Ludvig Åberg and Viktor Hovland share second place on 11 under, with Spaniard Pablo Larrazábal another stroke further back.