SapientNitro purchased an 81 percent stake in IThink, a Brazilian digital-marketing agency.

Boston-based Sapient’s expansion into Brazil is in response to client demand surrounding Brazil’s hosting the FIFA World Cup in 2014 and the Summer Olympics in 2016. Sapient is a marketing company that has done work for Chrysler, the Coca-Cola Corp. (NYSE: KO), Lufthansa German Airlines (FWB: LHA)., Target Corp. (NYSE: TGT), World Wrestling Entertainment Inc. (NYSE: WWE) and Vodafone Group plc (Nasdaq: VOD).

IThink, based in Sao Paulo, Brazil, counts Johnson & Johnson (NYSE: JNJ), Castrol, Nestle, Vivo/Telefonica, PepsiCo Inc. (NYSE: PEP), Kraft Foods Group Inc. (Nasdaq: KRFT), Google (Nasdaq: GOOG) and the Walt Disney Co. (NYSE: DIS) among its clients. Terms of the deal weren’t disclosed.

For more coverage on Brazil’s preparation for the World Cup and Olympics, see Mergers & Acquisitions feature “Brazil Needs to Pump Up for Olympics, World Cup.”