At 10th level, you can choose a second option from the Fighting Style class feature.
Additional Fighting Style
Raw data
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"srd": true,
"name": "Additional Fighting Style",
"page": 72,
"level": 10,
"__prop": "subclassFeature",
"header": 2,
"source": "PHB",
"entries": [
"At 10th level, you can choose a second option from the Fighting Style class feature."
],
"className": "Fighter",
"basicRules": true,
"classSource": "PHB",
"subclassSource": "PHB",
"subclassShortName": "Champion"
}