** Tennis News Roundup: Upsets and Victories on Both Sides. This week in tennis, Danielle Collins and Katerina Siniakova experienced difficulties as substitute players in the WTA Tour Finals, while Denis Shapovalov won his second ATP Tour title and Benjamin Bonzi secured his first in separate events. Other notable developments include Zheng Qinwen moving up to No. 5 on the rankings after reaching the finals in Riyadh.
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