オープン戦が終わり、いよいよ開幕だ。

おーぷん戦が終わり、いよいよ開幕だ。

The exhibition games are over and the regular season finally begins.

オープン戦(せ)が終(お)わり、いよいよ開幕(かいまく)だ。

O-punsen ga owari, iyoiyo kaimaku da.

オープン戦 (オープンせん)

exhibition game; open game

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

終わる (おわる)

to finish; to end; to close

愈々 (いよいよ)

more and more; all the more; increasingly; at last; finally; beyond doubt; (at the) last moment; worst possible time

開幕 (かいまく)

raising the curtain; opening (of an event); start of a season

だ (だ)

be; is; indicates past or completed action; indicates light imperative

Readings: セン、いくさ、たたか.う、おのの.く、そよ.ぐ、わなな.く

Meanings: war, battle, match

Readings: シュウ、お.わる、 -お.わる、おわ.る、お.える、つい、つい.に

Meanings: end, finish

Readings: カイ、ひら.く、ひら.き、 -びら.き、ひら.ける、あ.く、あ.ける

Meanings: open, unfold, unseal

Readings: マク、バク、とばり

Meanings: curtain, bunting, act of play