Warholm: Still grounded, but more confident
(IAAF News)

World 400m hurdles champion Karsten Warholm has already picked up where he left off last year, lowering his own national record in two of his three races this season, first to 47.82 in Rome and again to 47.81 in Stockholm. Through it all, he`s been battling with Qatari Abderrahman Samba in one of the sport`s newest and most exciting rivalries.