If you are cloning this repo, add this flag git clone --recursive so it pulls in the ethereum-bridge submodule.
Oraclize is already deployed on the mainnet and test networks. However, you need to deploy it to your local blockchains (ganache). To do this:
Start up Ganache:
ganache-cli
In another window, start the bridge from ganache to Oraclize:
cd ethereum-bridge
node bridge -a -9 -H 127.0.0.1 -p 8545 --dev
Take the outputted OAR value and add it to the Tournament.sol constructor.