The four-time World Player of the Year replaced Andres Iniesta after 63 minutes with Barcelona leading 2-0 thanks to a Cesc Fabregas double.
Messi put the tie to bed a minute from time when he slotted home a loose ball inside the area.
And he added his 16th goal of the season with a stunning run and finish to round off the scoring in stoppage time.
The Argentine coach also had Saturday's upcoming top of the table clash away to Atletico Madrid in mind as he made had made six changes to the side that started last weekend's 4-0 win over Elche.
However, with Messi and Neymar, ruled out by a stomach bug, again not in the starting line-up, Martino maintained the front three of Alexis Sanchez, Pedro Rodriguez and Fabregas.
Martino's selection proved inspired as Pedro's lobbed cross was expertly headed into the far corner by Fabregas after just eight minutes.
Barca did finally have the breathing space they craved when Juan Valera upended Pedro inside the area and Fabregas blasted the resulting penalty into the top corner.
That set the scene for Messi's arrival and he didn't disappoint as he calmly slotted home a loose ball inside the area with his trusted left-foot after Martin Montoya had burst into the Getafe box.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
