With some swing on offer Shaw tried to cart one outside the off-stump towards deep mid-wicket but the outside edge flew to David Miller at backward point.
Manjrekar, however, noted that there were no "obvious mistakes" in his captaincy and that he made some good decisions throughout the game.
In 24 encounters between the two sides, Chennai Super Kings have a hefty 15-9 lead over the Punjab franchise in terms of wins.
Ishant Sharma missed the games against Chennai Super Kings and Rajasthan Royals, which paved the way for 24-year-old pacer Avesh Khan's selection in the team.
Ashwin conceded just 14 runs and no boundaries in his three overs after being brought in following the powerplay on Thursday night when DC were defending a modest 148.
Punjab Kings vs Chennai Super Kings Dream11 Prediction: Find fantasy tips for IPL 2021 Match 8 PBKS vs CSK on indiatvnews.com.
Royals were reeling at 42 for five but the the side's South African players pulled off a three-wicket win with Miller hitting 62 and Morris producing a breathtaking 36 off 18 balls.
While CSK lost by seven wickets against Delhi Capitals in their opening match, Punjab Kings eked out a four-run win over Rajasthan Royals in a high-scoring thriller.
While Miller scored 62 off 43 deliveries, Morris smashed 18-ball 36 to seal the win for Royals.
Royals slumped to 17 for 3 in the fourth over and 42 for 5 at the halfway mark. However, David Miller's 43-ball 62 and Chris Morris' unbeaten 36 sealed the win for the Jaipur franchise.
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