Despite being a goal down, hosts India barged into the final of FIH Series Finals by demolishing Asian Games champions Japan 7-2 at Kalinga Stadium on Friday.
'Captain Cool' was spotted sporting the Army insignia during India's opening World Cup ficture against South Africa.
Chahal was at his devastating best against the Proteas as he bundled off four South Africa batsmen, including their skipper Faf du Plessis.
Chahal had an impressive World Cup debut against South Africa, picking 4 for 51 in India's six-wicket victory here.
Dhoni stepped out on the field with 138 List A stumpings under his belt and after sending Phehlukwayo back to the pavilion, he equalled the tally of Moin Khan.
Opening the bowling, his first over was a beauty - inducing false shots from South Africa opener Quinton de Kock on three occasions.
Bumrah, rated as one of the best in the business, was on the money from the word go, removing both openers Hashim Amla and Quinton de Kock cheaply.
The wrist-spinner first castled Proteas skipper Faf Du Plessis, followed it with the wicket of Rassie van der Dussen, before dismissing David Miller and all-rounder Andile Phehlukwayo.
Playing his 50th ODI match, India's talismanic speedster Jasprit Bumrah gave his side a dream start against South Africa by dismissing the dangerous Hashim Amla for just six runs.
This is India's first match in the tournament while South Africa will be playing their third match.
Cut to 2019 and one will see that while the aggression and passion for the game remains the same, Captain Kohli has now become much more relaxed.
The Faf du Plessis-led side would be aiming to win their third match to stay alive in the 50-over tournament.
The Proteas are hurting after two defeats against England and Bangladesh, while India are fresh and raring to go, and that only makes them more dangerous.
Before India's World Cup opener against South Africa, host broadcasters, Star Sports have come out with an advertisement where Indian fans are shown talking about their love for former coach and South
Kohli was seen struggling with his thumb on Saturday during a catch practice session at the Rose Bowl stadium. A ball hit his thumb and the team physio attended him, giving a spray to ease the pain.